Read the following statements with respect to molluscs. I. A soft and spongy layer of skin form...

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Read the following statements with respect to molluscs.

I. A soft and spongy layer of skin forming a thin delicate covering over the visceral hump is called mantle or pallium.
II. Octopus possesses the calcareous shell secreted by mantle.
III. Molluscs can have gills or lungs.
IV. Ganglia is absent.
V. Direct development occurs in Octopus, Sepia and Loligo.
Which of the above statements are incorrect?
(A) II and IV
(B) I, III and V
(C) I and III
(D) III and IV
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