Correct option is A
The correct matches are:
KS Krishnan was an eminent physicist known for his work on magnetism (A-I).
S S Bhatnagar was a renowned chemist and a pioneer in chemical research in India (B-II).
T S Venkataraman was a distinguished figure in agricultural science (C-III).
Birbal Sahni was a renowned paleobotanist who made significant contributions to the study of fossil plants (D-IV).
Information Booster:
KS Krishnan collaborated with C.V. Raman in the discovery of the Raman Effect and made major contributions to physics. S S Bhatnagar is often regarded as the father of Indian scientific research institutions, particularly in chemistry. T S Venkataraman contributed to agricultural research, helping improve crop yields and farming practices in India. Birbal Sahni founded the field of paleobotany in India, studying ancient plant fossils and contributing to our understanding of Earth’s prehistoric flora.