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

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

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

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

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

Explanation: 1, 3, 6 contain one complete circle each. 2, 5, 7 contain a semi-circle each. 4, 8, 9 contain a triangle each.