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 should be done to reduce obesity? \nSelect and explain. \nA. Decrease fat intake but have stomach full, B. Regular exercise with same amount of food, C. Reduce the amount of fat in diet only, D. Reduce intake of fats, carbohydrates and protein', 'role': 'user'}, {'content': 'Answer: B \nExplanation: WEIGHT CONTROL MEASURES:\nDietary changes:\n\nReduce proportions of carbohydrates and fats (energy dense foods)\nIncrease fibre consumption\nEnsure adequate levels of essential nutrients\n\nIncreased physical activity\nOthers:\n\nDrugs\nSurgical treatment\nHealth education', 'role': 'assistant'}]