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

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

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

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

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

Explanation: 1, 2, 7 are simple geometrical figures. 3, 5, 9 have one element placed inside a different element. 4, 6, 8 have two different elements attached to each other.