Assertion (A): It is not possible to have interference between the waves produced by two violins.
Reason (R): For interference of two waves, the phase difference between the waves must remain constant.
A) Both A and R are true, and R is the correct explanation of A.
B) Both A and R are true, but R is not the correct explanation of A.
C) A is true, but R is false.
D) A is false, but R is true.