Which two signs should be interchanged to make the

Select the option figure, which when placed in the blank space of the figure marked ‘X’, would complete the pattern.

Select the letter-cluster from among the given options that can replace the question mark (?) in the following series.

QHD, MNV, ITN, EZF, AFX, ?

Statements:

Some rats are mats.

All mats are ants.

Conclusions:

I. Some rats are ants.

II. Some ants are mats.

What should come in place of question mark (?) in the given series based on the English alphabetical order?

AYF, FUI, KQL, PMO, ?

Conditions – (i) If the second element and the last element are perfect squares, then the second and last elements are to be coded as ©.

What should come in place of '?' in the given series?

2  21  97  401  1617 ?

 In a certain code language,

A + B means ‘A is the son of B’,

A − B means ‘A is the wife of B’,

Which of the following terms will replace the question mark (?) in the given series? 

BCE, GHJ, LMO, QRT, ?