Verbal Reasoning - Mental Ability Questions

In the following question, select the related word pair from the given alternatives.
Heart : Organ : : ? : ?

A series is given, with one term missing. Choose the correct alternative from the given ones that will complete the series.

XFB,UGD ,RIG ,OLK, ?

A series is given, with one word missing. Choose the correct alternative from the given ones that will complete the series.

master, ember, bombay, animal, abdomen, ?

'A' and 'B' are brothers. 'C' and 'D' are sisters. A's son is D's brother. How is B related to C?

In the following question, select the related number from the given alternatives.
7 : 56 : : 11 : ?

If "P" denotes "multiplied by", "R" denotes "subtracted from", "S" denotes "added to" and "Q" denotes "divided by", then 6 P 7 S 169 Q 13 R 5 = ?

In a certain code language, '÷' represents '+', '-' represents 'x', '+' represents '÷' and 'x' represents '-'. Find out the answer to the followingquestion. 8 ÷ 14 - 20 + 5 x 2 = ?

Which set of letters when sequentially placed at the gaps in the given letter series shall complete it?

MN_NOM_OPM_OP_