The correct option is
D 4 triangles and 8 squares
Detailed step-by-step solution:
In this pattern, we can see that the number of triangles and squares is increasing with every group as we move from left to right.
In the first group, there is 1 triangle and 2 squares. The second group has 2 triangles and 4 squares, and the third group has 3 triangles and 6 squares.
So, we can see that the number of triangles are increasing by 1 and the number of squares are increasing by 2 in each group.
Therefore, the fourth group will have 4 triangles and 8 squares.
The complete pattern will be as shown below.
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1607571/original_6b.JPG)
Hence, Option A is correct.