This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Imaging of Metabolic Bone Disease, Subject name: Radiology
[{'content': 'Bone in a bone appearance is seen in all except - \nSelect and explain. \nA. Neonates, B. Acromegaly, C. Osteopetrosis, D. Active scurvy', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., Active scurvyo Bone in Bone appearance is seen in healed scurvy (not in active disease),o Bone within a bone appearance is seen in : -# Normal neonate# Prostaglandin El therapy# Growth arrest'recovery lines# Heavy metal (e.g., Lead) poisoning# Bisphosphonate therapy# Hypothyroidism & Hypoparathyroidism# Sickle cell anemia# Hypercalcemia & Hypervitaminosis D# Osteopetrosis# Rickets / Osteomalacia (healed phase)# Acromegaly# Scurvy (healed phase)", 'role': 'assistant'}]