Explanation:

- Ustad Bade Ghulam Ali Khan was an Indian classical musician known for his vocal mastery.

- Option 1: Tabla Player - This refers to someone who plays the tabla, a percussion instrument. Khan was not primarily known for playing the tabla.

- Option 2: Classical Singer - This is the correct answer. He was a legendary singer in the Hindustani classical tradition.

- Option 3: Harmonium Player - While harmonium is often used in accompaniment, Khan was celebrated for his singing.

- Option 4: Sarod Player - The sarod is a stringed instrument. Khan did not play this instrument professionally.