3. Asseration : Tetracycline is a broad spectrum antibiotic. Reason : Tetracycline is effective against a number of types of bacteria large viruses and typhus fever.

a.  It 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 the assertion and reason both are false

e. If assertion is false but reason is true.

Ans. a

Explanation : broad spectrum antibiotics are those medicines which are effective against serveral different types of harmful micro organisms.