Reasoning - Classification

Directions to solve :
In each of the following questions, four letters or letter groups have been given, out of which three are alike in some manner and the fourth one is different. Choose out the odd pair.
11.
Answer

Answer :

Option B

Explanation :


All other groups consist of three consecutive letters while this one doesn't.
12.
Answer

Answer :

Option A

Explanation :


In all other groups, the smaller letter is a vowel.
13.
Answer

Answer :

Option C

Explanation :


In all other groups, there is a gap of 1 letter between first and second letters, 2 letters between second and third and 3 letters between third and fourth.
14.
Answer

Answer :

Option B

Explanation :


This is the only group containing a vowel.
15.
Answer

Answer :

Option D

Explanation :


In all other groups, the first letter occupies the same position from the beginning of the alphabet as the last letter occupies from the end of the alphbet.
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