This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Growth and development, Subject name: Pediatrics
[{'content': 'The Simian crease is not seen in ______ \nSelect and explain. \nA. Down syndrome, B. Trisomy 13, C. Cri du chat syndrome, D. Cystic Fibrosis', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Simian crease (single transverse palmar crease) is not seen in cystic fibrosis. Simian crease is seen in : Down&;s syndrome Fetal alcohol sydrome Trisomy 13 Cri du chat syndrome Ref: Online resources', 'role': 'assistant'}]