Pasteurization is done at-
**Core Concept**
Pasteurization is a process used to kill harmful bacteria and other microorganisms in liquids, such as milk and juice. This process is named after **Louis Pasteur**, who developed it. The goal of pasteurization is to reduce the number of viable pathogens.
**Why the Correct Answer is Right**
The correct answer is related to the temperature at which pasteurization is typically performed. Pasteurization is usually done at a temperature of **63°C (145°F)** for 30 minutes or **72°C (161°F)** for 15 seconds. This temperature is sufficient to kill most bacteria, viruses, and other microorganisms.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because the temperature is too low to effectively kill all pathogens.
**Option B:** This option is also incorrect, but the correct answer is not provided to assess its accuracy.
**Option D:** This option is incorrect because the temperature is too high and may damage the liquid being pasteurized.
**Clinical Pearl / High-Yield Fact**
Remember that pasteurization does not sterilize liquids, but rather reduces the number of pathogens to a safe level.
**Correct Answer:** D. 63°C for 30 minutes or 72°C for 15 seconds