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

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

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

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

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

Explanation: 1, 7, 9 contain two similar elements one inside the other but not touching each other. 2, 3, 6 contain two similar elements one inside the other and both touching each other. 4, 5, 8 are divided into equal parts by straight lines emerging from the centre.