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': 'Which of the following is the richest source of Vitamin C? \nSelect and explain. \nA. Orange, B. Guava, C. Cabbage, D. Amla', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., Amla", 'role': 'assistant'}]