Final answer:
The minimum internal temperature for raw roasts of pork, beef, veal, and lamb should be 74 degrees C (165 degrees F) for at least 4 minutes before serving.
Step-by-step explanation:
The minimum internal temperature that raw roasts of pork, beef, veal, and lamb should be cooked to for at least 4 minutes before serving is 74 degrees C (165 degrees F). This temperature is necessary to ensure that any bacteria present in the meat are killed, making the food safe to eat. It is recommended to use a cooking thermometer to accurately measure the internal temperature of the roasts.