Pasteurization of milk is achieved by boiling at-
Wait, the options here are about boiling. The question says "boiling at-", but pasteurization isn't the same as boiling. Boiling is a different process, which uses higher temperatures. So if the options are about boiling temperatures, the correct answer would be the one that's not pasteurization. But the question is a bit confusing. Maybe the options are different temperatures, and the correct answer is the one that's not boiling. Wait, the correct answer is supposed to be about pasteurization, but the question is phrased as "Pasteurization is achieved by boiling at...". That seems incorrect because pasteurization uses lower temperatures than boiling. So the correct answer here is likely a temperature that's lower than boiling point, which is 100°C. So maybe the options include 63°C, 72°C, etc., and the correct one is one of those. But the user's correct answer is missing. Let me check the correct answer given by the user. Oh, the correct answer is left blank. Wait, in the example provided earlier, the correct answer is labeled with a letter. The user's example shows the correct answer as "D. 63°C for 30 minutes" or something similar. So the correct answer here is probably one of the standard pasteurization temperatures. Let me make sure. The options are missing, but the correct answer is likely a specific temperature and time. So the core concept is pasteurization vs. boiling. The correct answer would be the pasteurization method, and the incorrect options would be boiling or other incorrect temperatures. So in the explanation, I need to clarify that pasteurization is not boiling but using lower temperatures to kill pathogens like Mycobacterium tuberculosis, Brucella, etc. The wrong options might include boiling (100°C), which is not pasteurization. So the correct answer is the one that states the pasteurization temperature and time, not boiling. Let me structure the explanation accordingly. The core concept is the difference between pasteurization and boiling. Why the correct answer is right: because pasteurization uses 63°C for 30 minutes or 72°C for 15 seconds. Incorrect options would be higher temperatures (boiling) or incorrect times. Clinical pearl: pasteurization kills pathogens but doesn't sterilize. Correct answer is the one with the correct temp and time.
**Core Concept**
Pasteurization is a heat treatment process designed to reduce microbial load in milk, primarily targeting pathogens like *Mycobacterium tuberculosis* and *Brucella*. It differs from boiling, which fully sterilizes but alters milk's nutritional and sensory properties. The key is using lower temperatures for specific durations to balance safety and quality.
**Why the Correct Answer is Right**
The correct method involves heating milk to **63°C for 30 minutes** (batch pasteurization) or **72°C for 15 seconds** (high