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
[{'content': 'Which of the following diseases have incubation period < 10 days -a)  Cholerab)  Influenzac)  Plagued)  Measlese) Rubella \nSelect and explain. \nA. ab, B. bc, C. abc, D. bcd', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]