The correct option is
A Detailed step-by-step solution:
In this pattern, we can see the number of squares is the same, i.e., 1, in the first, third, and fourth block. But the number of circles is increasing.
There is 1 circle in the first block, 3 in the third block, and 5 in the fifth block. The number of squares remains unchanged.
So, we can say that there will be 1 square and 2 circles in the second block.
In the fourth block, there will be 1 square and 4 circles.
The complete pattern will be as shown below.
Hence, Option D is correct.