Identify the correct statement regarding entropy

Options

A. At absolute zero temperature , entropy of a perfectly crystalline substance is taken to be zero
B. At absolute zero temperature, the entropy of a perfectly crystalline substance is positive
C. At absolute zero temperature , the entropy of all crystalline substance is to be zero.
D. At `0^(@)C` , the entropy of a perfectly crystalline substance is taken to be zero.

Answer

A

Explanation

"At absolute zero temperature entropy of a perfectly crystalline substance is taken to be zero." It is called third law of thermodynamics.