Grouping of Images - Verbal and Reasoning

Directions to SolveIn each of the following questions, group the given figures into three classes using each figure only once.
Q1:

Group the given figures into three classes using each figure only once.

A 1,3,7 ; 2,4,6 ; 5,8,9

B 1,4,6 ; 2,5,7 ; 3,8,9

C 1,4,8 ; 2,5,6 ; 3,7,9

D 1,4,8 ; 2,7,9 ; 3,5,6

ANS:C - 1,4,8 ; 2,5,6 ; 3,7,9

Explanation: 1, 4, 8 contain similar elements (not equal in size) each divided into four parts and attached to each other. 2, 5, 6 contain three elements (two of which are similar) placed one inside the other. 3, 7, 9 contain one element inside the other, which may or may not be similar.