(A): If in the presence of two independent audio signals, no beats are heard, it need not imply that they are of same frequency.
(R): If the frequency difference is more than 10 Hz no beats are heared.

Options

A. Both 'A' and 'R' are true and 'R' is the correct, explanation of 'A'.
B. Both 'A' and 'R' are true and 'R' is not the correct explanation of 'A'
C. A' is true and 'R' is false
D. Both 'A' and 'R' are false

Answer

A