ANS:B - Boyle's temperature

The temperature at which a real gas obeys Boyle's law is called the Boyle's temperature. At Boyle's temperature, the real gas behaves ideally, meaning that its behavior conforms closely to Boyle's law, which states that the pressure of a given amount of gas held at constant temperature varies inversely with the volume of the gas. So, the correct term is: Boyle's temperature