Three of the four given words are alike in a certain

In the following question, select the odd pair of numbers from the given alternatives.

Three of the following four are alike in a certain way and so form a group. Which is the one that does not belong to that group?

Four letter-clusters have been given, out of which three are alike in some manner and one is different. Select the letter-cluster that is different.

Odd one out

Find the odd number pair from the given alternatives:

Identify the letter-cluster that does not belong to the following series.

MNF, RJI, WFL, BOB, GXR, LTU

Three of the four words are alike in a certain way and one is different. Pick the odd one out. 

Three of the four letter-clusters are alike in a certain way and one is different. Pick the odd one out.

Find the odd one out from the following options.