Analogy Questions

In the following question, select the related word from the given alternatives.
Book : Pages : : Continent : ?

Select the related letters from the given alternatives.
DFI : ACF :: OQT : ?

In the following question, select the related letters from the given alternatives.
PRAG : QTDK : : STOP : ?

Choose the related word/letters/number from the given alternatives.
NPR : GHI : : TVX : ?

Choose the related word/letters/number from the given alternatives.
36 : 6 : : 441 : ?

Select the odd word from the given alternatives.

Select the related word from the given alternatives.
River : Stream :: Ocean : ?

Select the related word/letters/number from the given alternatives.
25: 260 : : 30 : ?