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: Social & Preventive Medicine
[{'content': '2 years old child was brought to the emergency department. He was having convulsions. On a rapid general physical examination kyphoscoliosis was discovered X-ray showed swollen lower end of radius. What is the likely diagnosis? \nSelect and explain. \nA. Osteomalacia, B. Keratomalacia, C. Rickets, D. Pellagra', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]