Verbal Reasoning - Mental Ability Questions

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

Six persons L, M, N, O, P and Q sit in a linear row adjacent to each other facing north. Three persons sit between Q and P. N sits immediate left of Q. Two persons sit between N and M. How many persons sit to the left of M? 

Identify the diagram that best represents the relationship among the given classes.
Country, State, City

Select the odd word from the given alternatives.

In the following question, select the related letters from the given alternatives.
JQXE : LSZG : : MTNL : ?

Pointing towards a girl, Rajan said, she is the daughter of my mother's daughter. Then how is the girl related to Rajan?

In the following question, by using which mathematical operators will the expression become correct?
27 ? 9 ? 18 ? 24 ? 12

M is son of P, Q is the grand-daughter of O, who is the husband of P. How is M related to O?