Read the followin

a. (a)

b. (a)

c. (c)

d. (a)

In longitudinal waves, the particles in the medium vibrate along the direction of the propagation of the wave.

e. (d)

Sound wave is a type of longitudinal wave. Sound waves are characterized by the motion of particles in the medium and are called mechanical waves.

Sound waves follow the same laws of reflection. The directions in which the sound is incident and is reflected make equal angles with the normal to the reflecting surface, and the three are in the same plane.

The speed of sound in air is equal to 332 m/s

Hence, all the statements mentioned in the three options are correct. Thus D is the correct Solution.