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

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

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

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

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

Explanation: 1, 5, 7 contain a rectangle with its two diagonals as the outer element and another element (similar or different) placed inside it. 2, 6, 9 contain a triangle with its three medians as the outer element and another element (similar or different) placed inside it. 3, 4, 8 contain a circle with its two mutually perpendicular diameters as the outer element and another element (similar or different) placed inside it.