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': 'Candidates (s) for global eradication by WHO\na. Malariab. Dracunculosis c. Polio d. Measles e. Chicken pox \nSelect and explain. \nA. ab, B. abd, C. abc, D. bcd', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]