In the following questions, a statement of assertion (A) is followed by a statement of reason (R)
(1) If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark A
(2) If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark B
(3) If Assertion is true statement but Reason is false, then mark C
(4) If both Assertion and Reason are false statements, then mark D
Assertion: In cyclostomata, the exoskeleton is absent.
Reason: The endoskeleton is cartilaginous with bones.
A
B
C
D
The assertion is true, as Cyclostomata refers to a group of jawless fish, including lampreys and hagfish, and they do not possess an exoskeleton. However, the reason is false. The endoskeleton of Cyclostomata is not cartilaginous with bones but is mainly composed of cartilage Hence, the correct option is 3.