This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Principles of Epidemiology, Subject name: Social & Preventive Medicine
Components of epidemiological triad are all except 
Select and explain. 
A. Environment, B. Agent, C. Host, D. Pathogenesis
D: Pathogenesis
Answer: D: Pathogenesis 
Explanation: Ans. (d) PathogenesisThe causative factors of disease include AGENT, HOST, ENVIRONMENT . These 3 are referred as Epidemiological triad. Interaction of these 3 factors is required for development of disease .