A) Nacreous layer
B) Prismatic layer
C) Mantle layer
D) Both a and b
Correct Answer: C
Solution :
The nacreous layer is also known as mother of pearl. This layer is secreted by the whole surface of the mantle and is a smooth lustrous surface. The pearl is secreted by this layer as a protection against foreign body such as parasite or a sand particle.You need to login to perform this action.
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