Assertion : In Balanoglossus notochord is replaced by pygochord.
Reason : Pygochord supports adbominal region.

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

D

Explanation

Pygochord is longitudinal rod like structure extending from the ventral side of the intestine to the body wall, in the post hepatic region of the trunk. Its cells are vacuolated. It supports the post hepatic region of the body but probably also performs some other functions not yet understood.