Why is it necessary to eliminate other solutions in the

Four of the following five letter clusters are alike in a certain manner and one is different. Select the one which is different.

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

Four letter-clusters have been given out of which three are alike in a certain manner and one is different. Select the odd letter-cluster.

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

Select the option in which the numbers are not related in the same way as are the number of the following set.

(5, 12, 180)

Choose the odd one.

Three of the following four numbers are alike in a certain manner and one is different. Select the odd number.

Find the odd word from the given alternatives.

Find the ODD one 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.