A man stands at rest in front of a large wall. A sound source of frequency 400 Hz is placed between him and the wall. The source is now moved towards the wall at a speed of 1 m/s. The number of beats heard per second will be(speed of sound in air is 345 m/s)
(A) 0.8
(B) 0.58
(C) 1.16
(D) 2.32
