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Idioms Construction

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by [email protected] » Thu Nov 22, 2012 10:12 am
After a few weeks' experience, apprentice jewelers can usually begin to discriminate, though not with absolute certainty, genuine diamonds from imitation diamonds.


[A] genuine diamonds from imitation diamonds

genuine diamonds apart from imitations

[C] between genuine diamonds and imitation diamonds

[D] among genuine diamonds and imitation diamonds

[E] whether diamonds are imitation or genuine


The given OA is C.

My initial answer choice was A as normal idioms, but from the meaning's perspective, A goes wrong. Please can anyone try this one.
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Source: — Sentence Correction |

by Jim@StratusPrep » Thu Nov 22, 2012 11:15 am
You are comparing two different things, which is why between is needed. Your answer just says the jewler can recognize both items.
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