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

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

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

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

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

Explanation: 1, 3 contain a V-shaped element inside a geometrical figure. 2, 4, 5 contain two similar elements, one placed inside the other and touching it. 6, 7 contain geometrical figures which are divided into four equal parts by two mutually perpendicular straight lines.