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 included as "proximate principles" of nutrition? \nSelect and explain. \nA. Iron, B. Vitamin A, C. Carbohydrate, D. Calcium', 'role': 'user'}, {'content': "Answer: C \nExplanation: Macronutrients are also known as proximal principles of nutrition as they form the major bulk of food consumed by us. Macronutrients include carbohydrates, proteins and fats. Ref: Park's, 21st Edition, Page 562.", 'role': 'assistant'}]