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

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

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

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

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

Explanation: 1, 6, 8 are figures composed of straight as well as curved lines. 3, 7, 9 are closed figures shaded by oblique line segments. 2, 4, 5 are figures composed of straight lines only.