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': "Not true among the following is \nSelect and explain. \nA. Most common cause of Down's syndrome is Maternal meiotic disjunction., B. Most Common inherited condition causing Intellectual disability in Fragile X Syndrome, C. The mandible in Down's child is smaller than usual, D. Isolated finding of simian crease in Down's in seen in almost 20% of Down's children.", 'role': 'user'}, {'content': "Answer: D \nExplanation: Isolated finding of simian crease in Down's in seen in almost 1% of Down's children. So it is not a significant finding in a Down's child.", 'role': 'assistant'}]