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: Orthopaedics
[{'content': 'Trident hand seen in - \nSelect and explain. \nA. Achondroplasia, B. Mucopolysaccharidosis, C. Diphyseal achlasia, D. Cleido- cranial dystosis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Trident hand is seen in Achondroplasia.', 'role': 'assistant'}]