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
[{'content': 'Theory of web of causation was given by? \nSelect and explain. \nA. Me Mohan and Pugh, B. Pettenkoffer, C. John snow, D. Louis Pasteur', 'role': 'user'}, {'content': 'Answer: A \nExplanation: ANSWER: (A) Me Mohan and PughREF: Park 20th edition page 32"The web of causation theory was given by MC Mohan and Pugh"', 'role': 'assistant'}]