Identify the correct statement regarding entropy

Options

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

Answer

C