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': 'Rickety rosary seen in all except - \nSelect and explain. \nA. Rickets, B. Scurvy, C. Chondrodystrophy, D. Syphilis', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., Syphilis Rachitic (Rickety) rosary o The prominent knobs of bone at costochondral junctions of rickets patient is known as rachitic rosary or beading of ribs. o The knobs create the appearance of large beads under the skin of the rib cage, hence the name by analogy with the beads of a rosary. Differential diagnosis of enlargement of costochondral junction (Rosary) --> Rickets, Scurvy, Chondrodystrophy", 'role': 'assistant'}]