Verbal Reasoning - Mental Ability Questions

Select the related word/letters/numbers from the given alternatives:

12 : 54 :: 15 : ?

Select the related letters from the given alternatives.

DGI : JMO :: RUW : ?

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

MZU : CPK : : QSP : ?

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

Perimeter : Hexagon : : ? : ?

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

AEIM:BFJN::CGKO:?

Select the related word/letters/numbers from the given alternatives:

FJSP : DLQR :: GMIL : ?

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

Zoology : Animals : : Virology : ?

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

SPINSTER : ROHMRSDQ : : SEMESTER : ?