This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Concept of health and disease, Subject name: Social & Preventive Medicine
Epidemiological Web of Causation theory was given by 
Select and explain. 
A. Louis Pasteur, B. Robe Koch, C. McMahon and Pugh, D. None
C: McMahon and Pugh
Answer: C: McMahon and Pugh 
Explanation: The 'web of causation' considers all the predisposing factors of any type and their complex interrelationship with each other. Ref: 25th edition, Park's Textbook of Preventive and Social Medicine, Page no. 41