The correct option is B Louis Pasteur
Vaccines are the suspension of the live or killed microorganism which mainly activates the immune response. Louis Pasteur produced the first vaccine for rabies by growing the virus in rabbits. Pasteur was the first scientist to artificially attenuate viruses for use in vaccines. He created several veterinary vaccines before his development of the rabies vaccine in 1885 for use in humans. So, the correct answer is option C.