Find the odd image in the following diagram?

Find which does not belong to the group? Circle, Square, Rectangle, Triangle, Octagon 

In this question,four words have been given, out of which three are alike in some manner and the fourth one is different. Choose out the odd one?

Find out the odd word/letters/ number/number pair from the given alternatives.

Directions: In the following question four words have been given, out of which three are alike in some manner and the for one is different. Choose out the odd one.

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

Option

In this question, four words have been given, out of which three are alike in some manner and the fourth one is different. Choose out the odd one?

In each of the following questions, four numbers are given out of which three are like in some manner while one is different. Choose the one which is different from the rest three?