Question

Pasteurization of milk by the holder method is done at:

• A. 73 degrees C for 20 minutes
• B. 63 degrees C for 30 minutes
• 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 is controlled heating of milk to kill pathogenic organisms while preserving its nutritive and physical properties.

Step 2: The holder (low temperature long time) method heats milk to about 63 degrees C and maintains that temperature for 30 minutes, which matches option B.

Step 3: The alternative flash or HTST method uses a higher temperature of about 72 degrees C held for 15 seconds, followed by rapid cooling.

Step 4: The other listed options use mismatched temperature-time pairs, so the correct holder method answer is 63 degrees C for 30 minutes (option B).