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': 'Overall most common trisomy is \nSelect and explain. \nA. Trisomy 21, B. Trisomy 18, C. Trisomy 16, D. Trisomy 13', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Most common Trisomy overall is Trisomy 16. Most common Trisomy in live birth is Trisomy 21.', 'role': 'assistant'}]