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 has the highest protein energy ratio? \nSelect and explain. \nA. Milk, B. Pulses, C. Potato, D. Fish', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Food item Protein energy ratio Fish 80% Milk 20% Pulses 24% Rice 8% Potato 6% Ref: Park 21st edition, page 586.', 'role': 'assistant'}]