28. Assertion : Immunisation is achieved by the successful delivery of vaccines.
Reason : Vaccine is a preparation of one or more microbial agents used to induce protective immunity.
(1) Both assertion and reason are true and the reason is the correct explanation of the assertion.
(2) Both assertion and reason are true and the reason is not the correct explanation of the assertion.
(3) Assertion is true but reason is false
(4) Both assertion and reason are false