The correct option is A CSIR
Shanti Swarup Bhatnagar Prizes are awarded annually by the Council of Scientific and Industrial Research (CSIR) for notable and outstanding work in the field of Science. The Council of Scientific & Industrial Research (CSIR), known for its cutting-edge R&D knowledgebase in diverse S&T areas, is a contemporary R&D organization. It covers a wide spectrum of science and technology – from radio and space physics, oceanography, geophysics, chemicals, drugs, genomics, biotechnology and nanotechnology to mining, aeronautics, instrumentation, environmental engineering and information technology.