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': 'What is drug of choice in dysentery due to shigella? \nSelect and explain. \nA. Doxycycline, B. Ciprofloxacin, C. Tetracycline, D. No antibiotic is recommended', 'role': 'user'}, {'content': 'Answer: B \nExplanation: The drug of choice for shigella is ciprofloxacin. Shigella is usually resistant to ampicillin and cotrimoxazole. Ref: Park 21st edition, page 204.', 'role': 'assistant'}]