This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Concept of disease causation, Subject name: Social & Preventive Medicine
Theory of web of causation was given by? 
Select and explain. 
A. Me Mohan and Pugh, B. Pettenkoffer, C. John snow, D. Louis Pasteur
A: Me Mohan and Pugh
Answer: A: Me Mohan and Pugh 
Explanation: ANSWER: (A) Me Mohan and PughREF: Park 20th edition page 32"The web of causation theory was given by MC Mohan and Pugh"