Which one of the following statements is CORRECT about bivalve habitat?

Q. Which one of the following statements is CORRECT about bivalve habitat?

(A) Gryphaea is a burrowing variety.

(B) Pholas is a free lying form.

(C) Lucina is a boring variety.

(D) Mytilus is a bysally attached form.

Ans: Mytilus is a bysally attached form.