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': "What is known as 'poor man's meat'- \nSelect and explain. \nA. Milk, B. Pulses, C. Fish, D. egg", 'role': 'user'}, {'content': "Answer: B \nExplanation: Pulses are called poor man's meat. They are rich in protein. REF. PARK'S TEXTBOOK OF PREVENTIVE AND SOCIAL MEDICAL 21ST EDITION. PAGE NO - 628", 'role': 'assistant'}]