1. 

Group the given figures into different classes on the basis of their orientation, shape etc.

grouping-of-figures-non-verbal-reasoning-introduction---grouping-of-figures-problems
A. (1, 5, 7), (2, 3, 9), (4, 6, 8)
B. (1, 3, 9), (2, 4, 6), (5, 7, 8)
C. (3, 4, 7), (2, 4, 9), (1, 6, 8)
D. (6, 7, 9), (1, 3, 4), (2, 4, 8)

Answer: Option A

Explanation:

1, 5 and 7 contain two similar figures, one inside the other.
2, 3 and 9 form a group of figures in which half portion of the figure is enclosed inside that figure.
4, 6 and 8 contain two straight lines perpendicular to each other dividing the figure into four parts.