This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Social & Preventive Medicine
[{'content': 'Prospective screening is done in case of? \nSelect and explain. \nA. neonate for thyroid disease, B. Immigrant screening, C. Pap smear for 45 yr female, D. Diabetes mellitus for 4oyr male', 'role': 'user'}, {'content': 'Answer: B \nExplanation: ref : park 21st ed', 'role': 'assistant'}]