Explanation:

- Option 1: Rishabh Pant - Known for his explosive batting, but in this series, he did not win the Man of the Series award.

- Option 2: Avesh Khan - A promising fast bowler, but he did not win the award in this series.

- Option 3: Shreyas Iyer - Shreyas Iyer was exceptional in the T20I series against Sri Lanka, consistently scoring runs and leading the batting order. He was awarded the Man of the Series for his outstanding performance.

- Option 4: Mohammad Siraj - A talented bowler, but was not in the spotlight for this series.