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: Microbiology
[{'content': 'Most common age group effected in rubella is: \nSelect and explain. \nA. Infants, B. Adolscents, C. Pregnant females, D. Women of child bearing age', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Women of child bearing age', 'role': 'assistant'}]