Assertion : Open circulatory system is found in most arthropods.
Reason : Arthropods contain haemolymph which directly bathers internal tissues and organ.

Options

A. If both the assertion and the reason are true and the reason is a correct explanation of the assertion
B. If both the assertion and reason are true but the reason is not a correct explanation of the assertion
C. If the assertion is true but the reason is false
D. If both the assertion and reason are false

Answer

A

Explanation

Most arthropods certains molluscs and tunicates contain open circulatory system. In them, a fluid composed of blood mixed with tissue fluid bathes with internal tissues and organs directly. It oozes through spaces or cavitites that surround the organs, this mixture of fluid is usually referred to as haemolymph.