Explanation:

The correct option is (d) Vijay Bhatkar. Dr. Vijay P. Bhatkar is widely acclaimed as the 'Father of Indian Supercomputing' for his pivotal role in leading the development of India's first indigenous supercomputer, PARAM 8000, through the Centre for Development of Advanced Computing (C-DAC) in 1991. His work laid the foundation for India's supercomputing capabilities. Option (a) R. A. Mashelkar is a distinguished Indian chemical engineer and former Director General of CSIR, known for his contributions to science and innovation policy, but not supercomputing. Option (b) Nandan Nilekani is a prominent entrepreneur and co-founder of Infosys, known for his work on Aadhaar, not supercomputing. Option (c) Jayan Narlikar is an eminent Indian astrophysicist, known for his work in cosmology, not supercomputing.