Let's analyze the relationship step-by-step:
- "q’s son" means q has a son.
- "the son of q’s son" means q’s son has a son (which is q’s grandson).
- "p is the brother of the son of q’s son" means p is the brother of q’s grandson.
Since p and the son of q’s son are brothers, both are sons of q’s son. Therefore: p is also a grandson of q.
Final answer:
p is q’s grandson.
