Who among the following has been awarded with the 'Life Time Excellence' Award in Earth System Science in July 2020 by Ministry of Earth Sciences, Government of India ?

1. A

   S. Suresh Babu

   (a) S. Suresh Babu. He received a different Ministry of Earth Sciences honour in 2020, not the Life Time Excellence Award in Earth System Science.

2. B

   P. L. N. Raju

   (b) P. L. N. Raju. Not the July 2020 Life Time Excellence awardee in Earth System Science.

3. C

   S. P. S. Kushwaha

   (c) S. P. S. Kushwaha. Not that Life Time Excellence award.

4. D

   Ashok Sahni

   (d) Ashok Sahni. The Ministry of Earth Sciences gave the Life Time Excellence Award in Earth System Science (July 2020) to palaeontologist Ashok Sahni. That name is the official key.

Summary. Official key is (d). Ashok Sahni received the Ministry of Earth Sciences Life Time Excellence Award in Earth System Science in July 2020.