Which of the following is/are planning to organize a three-day online international conference on ‘Aerosol Air Quality, Climate Change and Impact on Water Resources and Livelihoods in the Greater Himalayas’?

• A. Aryabhatta Research Institute of Observational Sciences
• B. Hemvati Nandan Bahuguna Garhwal University
• C. Council of Scientific and Industrial Research
• D. Both 1 and 2
• E. All 1, 2 and 3