This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Concept of health and disease, Subject name: Social & Preventive Medicine
[{'content': 'Primary prevention among the following is \nSelect and explain. \nA. Marriage counseling, B. Amniocentesis, C. Pap smear, D. Self breast examination', 'role': 'user'}, {'content': "Answer: A \nExplanation: Marriage counseling is a type of primary prevention. Primary prevention: Action taken prior to the onset of the disease which removes the possibility that a disease will ever occur. Amniocentesis, Pap smear, and self-breast examination are screening tests to detect disease in the early phase which comes under secondary prevention - Early diagnosis and treatment. Marriage counseling includes the health promotion for the prevention of specific causal factors which help to decrease the incidence of disease. Ref: Park's Textbook of Preventive and Social Medicine; 24th edition - Page no.47, 865", 'role': 'assistant'}]