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': 'Which of the following characteristics are TRUE or FALSE about osteopetrosis in a child? 1. Growth retardation 2. Mental retardation 3. Multiple fracture 4. Cataract 5. Hepatosplenomegaly \nSelect and explain. \nA. 1,3, 5 True & 2,4 False, B. 1,3,4, True & 2,5 False, C. 1.3,4, True & 5,2 False, D. 2,3 False & 1,4,5 True', 'role': 'user'}, {'content': 'Answer: A \nExplanation: It is an autosomal recessive disorder in which paly calcified cailaginous intercellular ground substance is not regularly reabsorbed and replaced by regular osteoid tissue & bone. Clinical features are Multiple fractures, hepatosplenomegaly, growth retardation, blindness, dental problems, macrocephaly, deafness, etc. Ref: Ghai, 6th Edition, Page 600; Nelson, 18th Edition, Page 2882', 'role': 'assistant'}]