Number analogy section deals with two types of questions:
I. Choosing a similarly related pair as the given number pair on the basis of the relation between the numbers in each pair.
II. Choosing a number similar to a group of numbers on the basis of certain common properties that they possess.

number analogy

324 : 162

A. 64 : 36
B. 2 : 1
C. 22 : 10
D. 134 : 112
Answer: B . 2 : 1


Clearly, the relationship is 2x : x.
This relationship exists in (b).
So, the correct answer is (b).