54. Which of the following statements are true for both sound waves and electromagnetic waves?
I. They can undergo refraction.
II. They can undergo diffraction.
III. They can produce a two-slit interference pattern.
IV. They can produce standing waves.
(A) I and II only
(B) III and IV only
(C) I, II, III and IV
(D) II, III, and IV only
(A) I and II only
(B) III and IV only
(C) I, II, III and IV
(D) II, III, and IV only