This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Social & Preventive Medicine
Pasteurization is done at- 
Select and explain. 
A. 73 oC For 20 min, B. 63 oC For 30 min, C. 72 oC For 30 seconds, D. 63oC For 30 seconds
B: 63 oC For 30 min
Answer: B: 63 oC For 30 min 
Explanation: * Pasteurization of milk, widely practiced in several countries, notably the United States, requires temperatures of about 63deg C (145deg F) maintained for 30 minutes or, alternatively, heating to a higher temperature, 72deg C (162deg F), and holding for 15 seconds (and yet higher temperatures for shoer periods of time).