Exoskeleton of a marine snail is composed of...? Mcqs

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Exoskeleton of a marine snail is composed of...?

(A) Calcium Sulphate

(B) Calcium Carbonate

(C) Sulphur Dioxide

(D) None of these

✅ Correct Answer: Calcium Carbonate

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Source: This question is taken from the Junior Clerk (BS-11) Board of Revenue PPSC Past Paper

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