This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nutrition and health, Subject name: Social & Preventive Medicine
[{'content': 'How is the protein Energy Ratio (PER) in diet expressed as - \nSelect and explain. \nA. (Energy in diet \\/ protein in diet ) x 100, B. (Protein energy in diet \\/ Total energy in diet) x 100, C. (Protein energy in diet \\/ Total energy in diet) x 100, D. (Total energy consumed \\/ Total protein consumed) x 100', 'role': 'user'}, {'content': "Answer: B \nExplanation: -one way of evaluating food as the source of protein is to determine what percent of their energy value is supplied by their protein content. This is known as protein energy ratio. - PE percent= energy from protein*100/ total energy in diet. Reference : Park's textbook of preventive and social medicine, 23rd edition, pg no:634 <\\p>", 'role': 'assistant'}]