Out of different state parameters like `E, H, G, A` and S, only entropy(s) is the parameter whose absolute value can be determined, by using third law of thermodynamics. While perfect crystals hace zero entropy at `0K`, non-perfect crystals have some residual entropy at `0K`. From this info and the following data chart, answer the questions that follow :

Which of the substances will have residual entropy at `0 K`

Options

A. Only R
B. Only P
C. Q, R and S all three
D. Q and P only

Answer

c