Who propounded the germ theory of disease ?: (A) Leeuwenhoek, (B) Robe koch, (C) Ambroise Parre, (D) Louis Pasteur
Answer is D. Ans is 'd' i.e., Louis Pasteur Louis Pasteur (1822-1895) demonstrated by the presence of bacteria in the air, thereby disproving the theory of "spontaneous generation" and proposed "germ theory of disease"