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': 'Which is first and commonest clinical manifestation of Epidemic dropsy - \nSelect and explain. \nA. Bilateral swelling of legs, B. Gastroointestinal upsets, C. Cardiac decomposition, D. Sarcoid', 'role': 'user'}, {'content': "Answer: A \nExplanation: Symptoms of epidemic dropsy consist of sudden non inflammatory bilateral swelling of legs. REF. PARK'S TEXTBOOK OF PREVENTIVE AND SOCIAL MEDICAL 21ST EDITION. PAGE NO - 608", 'role': 'assistant'}]