This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Screening, Subject name: Social & Preventive Medicine
[{'content': 'Which of the following carriers recieved source of infection from other carrier is called- \nSelect and explain. \nA. Incubatory carrier, B. Convulescent carrier, C. Healthy carrier, D. Chronic carrier', 'role': 'user'}, {'content': 'Answer: C \nExplanation: .', 'role': 'assistant'}]