Which of the following is not an exception to

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.

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

Find the odd one out 

Four letter- clusters have been given, out of which three are alike in some manner, while one is different. Choose the odd one.

Find the one which does not belong to that group?

Find the odd one out 

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

Find the odd one out from the following options. 

Find the odd one out.