Correct option is D
In October 2023, US President Joe Biden awarded the National Medals of Science and Technology to distinguished individuals, including two Indian-American scientists:
Dr. Ashok Gadgil received the National Medal for Technology and Innovation for developing affordable solutions in water purification and energy efficiency for underserved communities.
Dr. Subra Suresh was awarded the National Medal of Science for his interdisciplinary research in materials science and engineering.
Information Booster:
• Dr. Ashok Gadgil is known for UV Waterworks and Berkeley-Darfur stoves.
• Dr. Subra Suresh has held leadership roles such as Director of the US National Science Foundation and President of Carnegie Mellon University.
• The National Medal of Science and National Medal of Technology and Innovation are among the highest scientific honors in the United States.
• The ceremony was held at the White House in October 2023.
• National Medal of Science: Established in 1959 to recognize outstanding contributions to science and engineering.