If MOLLIFY is to APPEASE as APPURTENANCE is to?

Direction: In the following question, select the related letters from the given alternatives.
Cotton : White :: Coal : ?

Direction: In the following question, select the related letters from the given alternatives. 

EHJ : KNP : : SVX : ?

The word 'cattle' is related to 'herd' in the same way as 'sportsman' is related to ______.

Choose the correct alternative.
Malaria : Disease :  : Spear : ?

In the following question, select the related word pair from the given alternatives.
Train : Track : : ? : ?

From among the given alternatives, select the one in which the set of numbers is most like the set of numbers given in the question.
Given set: (26, 13, 169)

Choose the odd pair group in following options?