Assertion : Physisorption of a gas adsorbed at low temperature may change into chemisorption at a high temperature.
Reason : Usually low pressure is also favourable for chemisorption
A. If both assertion and reason are true and reason is the correct explanation of assertion.
B. If both assertion and reason are true but reason is not the correct explanation of assertion
C. If assertion is true but reason is false
D. if both assertion and reason are false
