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': 'The value of protein in Soybean is about - \nSelect and explain. \nA. 43%, B. 50%, C. 58%, D. 64%', 'role': 'user'}, {'content': "Answer: A \nExplanation: Soyabean consist of 40percent of proteins. REF. PARK'S TEXTBOOK OF PREVENTIVE AND SOCIAL MEDICAL 21ST EDITION.PAGE NO - 580", 'role': 'assistant'}]