Question

Assertion :Passive immunity depends upon readymade antibodies. Reason: Passive immunity is of short life span.

• 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

Answer 1

The correct option is B if both Assertion and Reason are true but Reason is not the correct explanation of Assertion

When antibodies produced in one body (human or animal) are transferred to another to induce protection against disease, it is known as passive immunity, In other words, the body does not produce its own antibodies but depends upon ready-made antibodies. Passive immunity differs from active immunity in the following respects :
(a) immunity is rapidly established

(b) immunity produced is only temporary (days to months) till the antibody is eliminated from the body.

So, the correct answer is 'if both Assertion and Reason are true but Reason is not the correct explanation of Assertion'.