difference between among and between

[Afarhans]

English Language Tests, Intermediate level

ESL/EFL Test #99 "Student Teacher Dialogue (2)", question 6

Student: I see. But what's the difference ......... in and into?

(a) from
(b) among
(c) between
(d) for

English Language Tests, Intermediate level

ESL/EFL Test #99 "Student Teacher Dialogue (2)", answer 6

Student: I see. But what's the difference between in and into?

Correct answer: (c) between

Your answer was: incorrect
Student: I see. But what's the difference among in and into?
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why between is the correct answer, not among since I think among is represent 2 choices and between 2 or more choices.. am I correct?

[Beeesneees]

You have the usage wrong, Afarhans.

between - reference to a choice or differentiation involving two or more things being considered together.

Although 'among' can indicate a division, choice, or differentiation involving three or more participants, it doesn't apply here. Apart from anything else, there are only two things under consideration.
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Cheers m' dears!