C. V. Raman got the Nobel Prize in 1930 for his discovery of:

The correct answer is Option (2) → Raman Effect

Sir C. V. Raman received the Nobel Prize in Physics in 1930 for his work on the scattering of light and the discovery of the Raman effect: when light passes through a transparent substance, a small part of the scattered light comes out with a changed wavelength. He announced the discovery on 28 February 1928, the day now observed as National Science Day.