A source of sound S emitting waves of frequency 100 Hz. And an observer O are located at some distance from each other. The source is moving with a speed of `19.4ms^(-1)` at an angle of `60^(@)`with the source observer line as show in the figure. The observer is at rest . The apparent frequency observed by the observer in air is `330 ms^(-1)` , is

Options

A. 103 Hz
B. 106 Hz
C. 96 Hz
D. 100 Hz

Answer

A