Which of the following is not a mosquito borne disease

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. 

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

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.

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

Four words 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 some manner and one is different. Select the odd letter-cluster.

Select the number that is different from the rest.

Four numbers have been given, out of which three are alike in a certain way and one is different. Select the one that is different.

Find odd one out from the following. Square, Rectangle, Parallelogram, Triangle

Pick the odd one out: