This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: PH Care, Elements & Principles, Subject name: Social & Preventive Medicine
[{'content': 'Single disease control strategy done by program known as \nSelect and explain. \nA. Horizontal program, B. Veical program, C. Interventional program, D. Volunteer program', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Health systems are made up of: * "Horizontal system" of general services, providing prevention and care for prevailing health problems. "Veical programmes" for specific health conditions .', 'role': 'assistant'}]