Sentence Correction - Verbal and Reasoning

Directions to SolveWhich of phrases given below each sentence should replace the phrase printed inboldtype to make the grammatically correct? If the sentence is correct as it is, mark 'E' as the answer.
Q1:

They examined both the samples very carefully but failed to detect any difference in them.

A some difference in

B some difference between

C any difference between

D any difference among

E No correction required

ANS:C - any difference between

No answer description is available.