I saw the question as: Select the correct word***(s)***…
So I chose, B) and D)
He had to select from_among 6 ties…
Now that I see it written, it looks horrid(ly).
Of course, no one who cares about good writing would have written that sentence in the first place.
He had to choose one from his six ties for the interview.
It was hard to choose which of his six ties to wear at the interview.
He knew that whichever of his six ties he selected, it would probably be the wrong one for the interview.
Like most men, when dressing for his interview, he relied on his wife to choose the right tie from the six he owned.
Why not wear an ascot?
bob++, thank you for that awesome response 
They got funnier and funnier. Of the 5 sentences you provided, each was funnier than the next 
Not an answer, but I can’t believe I’m the first person to think of this:
He had to choose _______ 4 possible answers to this question.
My natural language choices (the way I would speak) would go: “from,” “between,” and maybe “among.” For a test where there is only one answer, I would assume they’re fishing for “among.”
I think you were right the first time. “From among” is the right way to say it, and much better than any of the proffered single-word alternatives. (Of course it is not what the examiners want, but they are clearly idiots.)
Among is the clear choice to me.
I can see that one being important, but as a vocabulary question. Military time is neither commonly used in every culture nor specifically taught to foreign students, but it’s something a nurse is likely to run into, and it may be in a situation where having to ask “what does oh-400 mean?” would hamper the proceedings.
From my ESL classes, I knew it would be “among”, but I’m more accustomed to hearing “between”, “from between” or “from among”. Note that many of the people I speak English with have first languages whose preposition for this instance is most often translated as “between”: for this reason, this nit was popular among my ESL teachers, but also, it may be a more-popular choice than for other groups.
Same here. “Select among” and “choose among” actually sound like an ESL error to me. I’d accept “from” without “among,” too, but “among” by itself just sounds horribly wrong.
I would have assumed the answer they wanted was among, but I would never say “He had to select among 6 ties for the job interview” and I’m about 95 percent sure that I’d never, in daily speech say "select from 6 ties"or “select between 6 ties”. I would say choose and I would say one of these 6 ties.
Test iz stoopid. So it is written, so mote it be.
I’m just amazed that they couldn’t simply ask questions selected from a list with non-equivocal answers.
The answer is “from” , if we take the meaning to steer us .
“From” says that the following is the source set … (what choices he has.)
“among” doesn’t work as it does not stipulate either what he is choosing from or what he chose.
Meaning steers grammer too.
I found this little discussion about that exact question here. It doesn’t really elucidate too much, but a few posters do mention the “between is only used for two” myth as a myth. “Between” can be used for more than two choices.
Between and among would both be fine, imo. Between is not just for two items when you’re talking about choices; it is when between is a preposition of space, but it’s not in this sentence. Among is also not a preposition of space in this sentence, so your reasoning doesn’t work.
From would only work with a noun added because from usually takes two nouns. However, personally I’d consider “from” acceptable in this sentence anyway, because you can assume the other noun (a tie) to be implied, so would not set this question.
Guizot is absolutely correct in his (?) original post. What this example should do in its small way is to educate those on the SDMB who may be typical of Americans in that they have utmost confidence in test makers. So much so that they are willing to judge, say, one teacher or one school or one child on the basis of the “scores” of one test. Tests are made by test-makers and are designed in ways that undermine the purported purposes and uses of the tests. One example: a question that most kids get correct on a piloted test will be thrown out from the final version. This is because it doesn’t discriminate between those who know the answer and those who don’t. However, that question may be answered correctly because the majority of kids learned what was taught about that topic. That’s the point of education, yes? But showing that knowledge causes a perfectly good measure of what people have learned to be omitted. Not statistically useful, they say. But what if the use of the test was to determine if kids had learned what was taught? Ahhh - don’t get me started.
Filling in the unsaid but understood noun:
“He had to select (a tie) _____ 6 ties for the job interview.”
I would use “from”.
Substituting “choose” for “select” :
“He had to choose _______ 6 ties for the job interview.”
I would use “from”.
(Maybe I just don’t like the word “among”!)
I chose “from”. And I know what the hell I’m talking about. I may be the only one, but I know what the hell I’m talking about.
The correct answer is “from”.
Well that settles that. 
That’s my preferred choice, from the way I speak, but I bet dollars to donuts the test is going for “among.”
It is an idiotic question since only an idiot thinks there is a correct answer to such a question. Between you and me and the lamppost, I will tell you that neither you, I or the questioner knows an infallible rule to distinguish “among” from “between”.