Assertion : Hepatitis -B vaccine produced from yeast .
Reason : Recombinant DNA technology has allowed the production of antigenic polypeptides of pathogen in bacteria or yeast.
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 both assertion and reason are false.