Physics · JEE | THERMODYNAMICS

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): The entropy of a pure crystalline substance is taken as zero at 0 K. Reason (R): At absolute zero, the constituent particles are completely static and possess perfect order in the crystal lattice. In the light of the above statements, choose the correct answer from the options given below:

1. A
   Both (A) and (R) are true but (R) is NOT the correct explanation of (A).
2. B
   Both (A) and (R) are true and (R) is the correct explanation of (A).
3. C
   (A) is true but (R) is false.
4. D
   (A) is false but (R) is true.