Read the assertion and reason carefully to mark the correct option out of the options given below:
(a)If both assertion and reason are true and the reason is the correct explanation of the assertion.
(b)If both assertion and reason are true but reason is not the correct explanation of the assertion.
(c)If assertion is true but reason is false.
(d)If assertion is false but reason is true.
Assertion  : Ranitidine is an antacid.
Reason  : It prevents the interaction of histamine with the receptors present in the stomach  walls thereby producing less hydrochloric acid.