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
Which of the following should be done to reduce obesity? 
Select and explain. 
A. 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
B: Regular exercise with same amount of food
Answer: B: Regular exercise with same amount of food 
Explanation: WEIGHT CONTROL MEASURES:
Dietary changes:

Reduce proportions of carbohydrates and fats (energy dense foods)
Increase fibre consumption
Ensure adequate levels of essential nutrients

Increased physical activity
Others:

Drugs
Surgical treatment
Health education