This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Social & Preventive Medicine
Incubation period helps in determining all except? 
Select and explain. 
A. Period of isolation, B. Period of quarantine, C. Identification of source of infection, D. Immunization
A: Period of isolation
Answer: A: Period of isolation 
Explanation: Ans. is 'a' i.e., Period of isolation Incubation period is useful for : - i) Tracing the source of infection and contacts. ii) Period of surveillance or quarantine iii) Immunization iv) Identification of point source or propagated epidemics v) Estimating the prognosis of a disease.