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': 'An obese lady accountant working in POF hospital Wah Cantt came to the dietician there and took advice for a balanced diet. Dietician told that important point for prudent diet is that \nSelect and explain. \nA. Unsaturated fats should be less than 10%, B. Dietary fat should be limited to 20-30% of total intake, C. Avoidance of complex carbohydrates, D. Proteins should account for 50-60% of diet', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]