(A): For the formation of stationary waves the medium must be bounded (having definite boundaries).
(R): In the stationary wave, some particles of the medium remain permanently at rest.

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

C