Explanation:

Given information:
The question presents a set of symbols followed by a question mark, and the task is to determine the missing symbol in the sequence.

Analysis:
- Looking at the symbols provided, we can identify a pattern that is being followed in the sequence.
- By observing the symbols closely, we can see that the pattern involves alternating between a square and a circle.
- Additionally, the symbols are rotating in a clockwise direction.

Identifying the missing symbol:
- The missing symbol should follow the established pattern of alternating between a square and a circle, while also rotating in a clockwise direction.
- Based on this pattern, the missing symbol should be a circle.
Therefore, the correct answer is option 'B,' which is a circle. This choice aligns with the established pattern of the sequence provided.