This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Disease Causation, Measurements, Milestones, Subject name: Social & Preventive Medicine
Attack rate is:- 
Select and explain. 
A. Incidence of the disease, B. Prevalence of the disease, C. Killing power of the disease, D. Incubation period of the disease
A: Incidence of the disease
Answer: A: Incidence of the disease 
Explanation: Attack Rate Is synonymous with disease incidence. Other synonyms include risk/ hazard. Incidence = x 1000 .