Verbal Reasoning - Mental Ability Questions

A is the brother of B. B is the brother of C. D is the father of A. Based on these three statements, which of the following statements cannot be definitely true ?

Select the related word/letters/number from the given alternatives.

24:60::210:?

Select the related word/letters/number from the given alternatives.

VERMIN :? :: ORDERS : ERSORD

Select the related word/letters/number from the given alternatives.

Paw:Cat::Hoof:?

  I. A, B, C, D, E and F are six members of a family. 

 II. One couple has parents and their children in the family. 

 III. A is the son of C and E is the daughter of A. 

 IV. D is the daughter of F who is the mother of E. 

Which of the following pairs is the parents of the children ? 

Choose the word which gives best meaning to the sentence from the given options.

His recent success ______ him more arrogant than what he used to be

Select the related word/letters/number from the given alternatives.

FGH : ? : : QRS : SUW

In the following question, select the related letter pair from the given alternatives.

FOM : CLJ : : ?  :  ?