Verbal Reasoning - Mental Ability Questions

If PQRST : SPTRQ then HIJKL : ?

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

LETTER : MFUUFS : : AHEAD : ?

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

DCEF : QPRS :: XWYZ : ?

Choose the missing terms out of the given alternatives Z, X, S, I, R, R, ?, ?

Select the related word from the given alternatives.

Yellow : Lemon :: Purple : ?

In the following question, select the related number from the given alternatives.

553 : 551 : : 447 : ?

Select the related word from the given alternatives.

Hope : Despair :: Lunatic : ?

Select the related word from the given alternatives.

Office : Colleagues :: Home : ?