Verbal Reasoning - Mental Ability Questions

Q is the son of R but R is not the mother. So, R is the Father of Q. P is married to R 

So, P is the wife of R and the mother of Q, X is the daughter of P and hence of R and so she is the Sister of Q, Y is the brother of R and Z is the brother of P. 

It is the husband of P and Z 13 the brother of P So, Z Is the brother-In-law of R 

That man's son means Mukesh

=> Mukesh father's son is Mukesh

=> It is Mukesh's father.

In all other pairs, second is of higher intensity than the first.

t, u, u and t.

The sequence is : tut tut tut tut.

 The letters in the first row follow the sequence +5, +7.

The letters in the second row follow the sequence +6, +8.
In the third row, the first letter G moves 7 steps forward to give the second letter N.
Clearly, the missing letter will be 9 steps ahead of N i.e. W.

Penology is the study of punishment. Similarly, Seismology is the study of Earthquakes.

Hence, Penology : Punishment :: Seismology : Eartquakes.

The first, fourth, seventh and eleventh letters of the word 'SUPERFLUOUS' 

The word formed is LESS

Therefore, The first letter is L.