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: Pediatrics
[{'content': 'Which of the following is not a common manifestation of Congenital Rubella – \nSelect and explain. \nA. Deafness, B. PDA, C. Aortic stenosis, D. Mental retardation', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Nerve deafness is the single most common clinical finding among infant with congenital Rubella syndrome.\nFDA is the most common CHD in congenital rubella syndrome.\nClassical triad of congenital rubella consists of → Cataract, Deafness, CHD\nMental retardation is also common.', 'role': 'assistant'}]