JEE Main 2019 Physics question

A musician using an open flute of length 50 cm produces second harmonic sound waves. A person runs towards the musician from another end of a hall at a speed of 10 km/h. If the wave speed is 330 m/s, the frequency heard by the running person shall be close to:

• (A)753 Hz
• (B)666 HzCorrect
• (C)500 Hz
• (D)333 Hz