This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Epidemiological Study, Subject name: Social & Preventive Medicine
Pandemic is defined as - 
Select and explain. 
A. Endemic in small population, B. Endemic in large population, C. Epidemic in small population, D. Epidemic is large population
D: Epidemic is large population
Answer: D: Epidemic is large population 
Explanation: Ans. is 'd' i.e., Epidemic is large population Sporadic - Disease occurring irregularly from time to time. Endemic - Disease occurring regularly in expected frequency. Epidemic - Disease occurring in excess of expected frequency. Pandemic - Epidemic affecting a large proportion of the population over a wide geographic area.