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
[{'content': 'Attack rate is:- \nSelect and explain. \nA. Incidence of the disease, B. Prevalence of the disease, C. Killing power of the disease, D. Incubation period of the disease', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Attack Rate Is synonymous with disease incidence. Other synonyms include risk/ hazard. Incidence = x 1000 .', 'role': 'assistant'}]