Identify a type of season that is NOT a part of the four

Three out of the following four words are similar in meaning. Find the word that is different from the rest.

Select the letter cluster which does not belong to the same group from the given alternatives.

Four number-pairs are given, out of which three are alike in certain manner and one is different. Choose the different number-pair.

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

Find the odd word pair out from the given options.

Four number-pairs have been given, out of which three are alike in some manner and one is different. Select the number-pair that is different.

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

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. 

Arrange the letters of each group to make a meaningful word and find the odd man out: