Question

Germ theory was proposed by whom?

• A. Avicena
• B. Louis Pasteur
• C. John Snow
• D. Ronald Ross

Hint:

Louis Pasteur is widely associated with the Germ Theory of Disease and modern microbiology.

Answer 1

The Correct Option is B

Concept: The Germ Theory of Disease states that many diseases are caused by microorganisms such as bacteria, viruses, fungi, and protozoa. This theory revolutionized medical science by establishing that infectious diseases spread through germs. Louis Pasteur played a major role in developing and proving the germ theory through his experiments on microorganisms and fermentation.

Step 1: Analyze option A.
Avicena (Ibn Sina) was a famous Persian physician who contributed greatly to medicine, but he did not propose the germ theory.
Hence, option A is incorrect.

Step 2: Analyze option B.
Louis Pasteur proposed and developed the Germ Theory of Disease through experimental evidence.
Hence, option B is correct.

Step 3: Analyze option C.
John Snow is known as the father of epidemiology for tracing the source of cholera outbreaks, not for proposing germ theory.
Hence, option C is incorrect.

Step 4: Analyze option D.
Ronald Ross discovered the role of mosquitoes in malaria transmission, but he did not propose germ theory.
Hence, option D is incorrect. Therefore, the correct answer is: \[ \boxed{(B)\ \text{Louis Pasteur}} \]