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': 'Under eradication of congenital rubella syndrome program the first priority group for rubella vaccination is \nSelect and explain. \nA. All nonpregnant women of age 15-44 years, B. All adolescent nonpregnant girls 15 to 24 of age, C. All female children at one year, D. All nonpregnant women', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]