Final answer:
Regular temperature milk is typically not heated to very high temperatures. Based on the provided information on milk pasteurization, a temperature of 72 °C for 15 seconds is used in a method called high-temperature short-time (HTST) pasteurization.
Step-by-step explanation:
In regular temperature milk, the temperature is not specified in the question. However, based on the provided information on milk pasteurization, regular temperature milk is typically not heated to very high temperatures. One method of pasteurization, called high-temperature short-time (HTST) pasteurization, heats milk to a temperature of 72 °C for 15 seconds. Therefore, option 4) 70°C is the closest temperature to regular temperature milk.