This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Epidemiology, Subject name: Social & Preventive Medicine
[{'content': 'Mass prophylaxis is given for a/e- \nSelect and explain. \nA. Lymphatic fillariasis, B. Vitamin A deficiency, C. Scabies, D. Worm infestation', 'role': 'user'}, {'content': 'Answer: C \nExplanation: .', 'role': 'assistant'}]