This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Communicable diseases, Subject name: Social & Preventive Medicine
[{'content': 'Which of the following is not true about sabin vaccine? \nSelect and explain. \nA. Three doses are given in primary immunization, B. The doses are given at 4-6 weeks interval, C. Given intramuscularly, D. Contains all the 3 strains', 'role': 'user'}, {'content': 'Answer: A \nExplanation: <p> The primary course of immunisation consists of 4 inoculations. Reference:Park&;s textbook of preventive and social medicine,K.Park,23rd edition,page no:206. <\\p>', 'role': 'assistant'}]