The tempeature at which both centigrade and Fahrenheit thermometer will read same temperature is

Statement I : The temperature at which Centigrade and Fahrenheit thermometers read the same is -40^(@) . Statement II : There is no relation between Fahrenheit and Centigrade temperature.

Assertion : The temperature at which Centigrade and Fahrenheit thermometers read the same is -40^(@) . Reason : There is no relation between Fahrenheit and Centigrade temperature.

The temperature at which Centigrade thermometer and Kelvin thermometer give the same reading, is