Who among the following Indian Scientists made contributions to the field of quantum mechanics?

Satyendra Nath Bose

The correct answer is Option (4) → Satyendra Nath Bose

Satyendra Nath Bose made fundamental contributions to quantum mechanics, especially through Bose–Einstein statistics, which led to the prediction of Bose–Einstein Condensate.

C. V. Raman → Known for the Raman Effect (spectroscopy)

Har Gobind Khorana → Molecular biology and genetics

Jagdish Chandra Bose → Plant physiology and radio science