Question

The holder (low-temperature) method of pasteurization of milk is done at:

• A. 73 degrees C for 20 min
• B. 63 degrees C for 30 min
• C. 72 degrees C for 30 seconds
• D. 63 degrees C for 30 seconds

Hint:

Holder method = low temperature, long time.

Answer 1

The Correct Option is B

Step 1: Pasteurization heats milk to destroy pathogens (notably Mycobacterium bovis, Coxiella burnetii, and other vegetative organisms) while preserving nutritive value. Step 2: The holder or low-temperature long-time (LTLT) method heats milk to 63 degrees C and holds it there for 30 minutes - this is option B. Step 3: The alternative high-temperature short-time (HTST) flash method heats milk to 72 degrees C for 15 seconds. Step 4: Options A and C give non-standard temperature-time pairs, and option D (63 degrees C for 30 seconds) is too brief for the holder method, so the correct standard holder-method answer is 63 degrees C for 30 minutes.