Which of the following class is being correctly described?
(1) All living members are ectoparasites on some fishes
(2) They have a sucking, circular mouth without jaws
(3) Circulation is of closed type
(4) They are marine but migrate to fresh water for spawning and die soon after
Choose Your Option
A. Cyclostomata
B. Chondrichthyes
C. Osteichthyes
D. Amphibia
Solution & Explanation
No details explanation available for this question. Option A is the verified correct answer.