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': 'Incubation period of plasmodium vivax is: \nSelect and explain. \nA. 5 - 7 days, B. 7 - 10 days, C. 10 - 14 days, D. 15 - 30 days', 'role': 'user'}, {'content': 'Answer: C \nExplanation: 10 - 14 days', 'role': 'assistant'}]