Answer- D
National Science Day is celebrated annually on February 28 to commemorate the discovery of the "Raman Effect" by Indian scientist and physician, Chandrasekhara Venkata Raman, also known as C.V. Raman. T
his day serves as a tribute to the significance of science and as a reminder of its impact on the lives of people. This year, in recognition of India's G20 leadership, the event is themed "Global Science for Global Wellness."