question_answer

Which one of the following statements is correct?

(i) Sound waves need material medium to propagate.

(ii) Electromagnetic waves do not need material medium for their propagation.

(iii) Mechanical waves can travel even through vacuum.

(iv) Light waves are longitudinal waves in nature.

A) (i) and (ii)

B) (ii), (iii) and (iv)

C) (iii) and (iv)

D) (i), (iii) and (iv)

E) None of these