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': "Diagnosis of the following karyotyping \nSelect and explain. \nA. Down's syndrome, B. Cri du chat syndrome, C. Turner's syndrome, D. Patau Syndrome", 'role': 'user'}, {'content': 'Answer: B \nExplanation: Cri du chat syndrome\xa0is due to deletion of short arm of 5th Chromosome.', 'role': 'assistant'}]