Pressure cooking is the process of cooking food, using water or other cooking liquid, in a sealed vessel known as a pressure cooker.
This simulates the effects of long braising within a shorter time.
Almost any food that can be cooked in steam or water-based liquids can be cooked in a pressure cooker.
The larger hole will lead to an increase in the steam going out leading to a greater reduction in temperature. Hence, statement 1 is correct.
Increasing the surface pressure on the liquid inside the closed cooker we can raise the cooking temperature. This pressure can be adjusted by changing the weight placed on the top of the cooker lid. Hence, statement 3 is correct.
Boiling water can never go over 100°C no matter how high the flame under the pot. But in the pressure cooker, the temperature can rise to 121°C. The higher cooking temperature reduces the cooking time and not temperature. Hence, statement 2 is not correct.