As we learned in
Gay Lussac’s Law -
This gives Pressure-Temperature Relationship as
means According to Gay Lussac's law, at a constant pressure of a given mass of a gas is directly proportional to the absolute temperature of the gas. Hence, on increasing pressure, the temperature is also increased.
Thus in pressure cookers due to an increase in pressure the boiling point of water involved in cooking is also increased.
i.e
The increased pressure inside the cooker increases the boiling point of water above C so more cooking is done before the water actually starts to boil. So ultimately food is cooked faster.
so the correct answer is option B.
i.e Boiling point of water involved in cooking is increased