A) Presence of true coelom and metamerism (metamerisation)
B) Absence of true coelom but presence of metamerism
C) Presence of neither true coelom nor metamerism
D) Presence of true coelom but absence of metamerism
Explanation
[Solution from source] Ascaris is an aschelminth (roundworm): it is pseudocoelomate and its body is not segmented. True coelom together with metamerism is the annelid condition, not that of nematodes. Answer (3).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.