Which of the following best illustrates an achievement of classical Indian science? A. A Daoist priest teaches a class on stress and relaxation at a local college. B. A citizen of the United States elects representatives to make decisions. C. A teacher demonstrates that gravity acts on all objects equally. D. An astronomer demonstrates that earth moves in relation to the sun.

Among the choices the one that best illustrates an achievement of classical Indian science is D, an astronomer demonstrates that earth moves in relation to the sun. Indian astronomy has a long history extending from pre-notable to current circumstances. A portion of the most punctual foundations of Indian cosmology can be dated to the time of Indus Valley Civilization or prior.