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.
16.
Answer

Answer :

Option D

Explanation :


In all other groups, the three letters are consecutive but in reverse order.
17.
Answer

Answer :

Option D

Explanation :


All other groups contain two consecutive letters of the alphabet.
18.
Answer

Answer :

Option A

Explanation :


All other groups contain alternate letters of the alphabet.
19.
Answer

Answer :

Option C

Explanation :


This is the only group containing three vowels.
20.
Answer

Answer :

Option D

Explanation :


This is the only group containing two vowels.
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