This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nutrition and health, Subject name: Social & Preventive Medicine
[{'content': 'Pasteurization of milk is achieved by boiling at - \nSelect and explain. \nA. 65 oC for 30 min, B. 72 oC for 10 sec, C. 100 oC for 20 sec, D. 136 oC for 30 sec', 'role': 'user'}, {'content': "Answer: A \nExplanation: In holder method milk is kept at 63-66 deg C for atleast 30 min.REF.PARK'S TEXTBOOK OF PREVENTIVE AND SOCIAL MEDICINE.Editon-21.Page no.-606", 'role': 'assistant'}]