Analogy Questions

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

21 : 3 :: 574 : ?

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

ACEG : ZXVT :: IKMO : ?

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

Calender : Dates : : Dictionary: ?

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

TC : NF : : QM : ?

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

VERMIN :? :: ORDERS : ERSORD

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

2 : 16 : : 3 : ?

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

4: 1024 :: 7 : ?

 ______ : trail :: grain : grail