Question

Identify A and B in the following statement.
During vaccine production, toxins are altered to obtain .............. A which acts as an antigen and then mixed with ............ B to improve immune response.

• A. A - adjuvant, B - toxoid
• B. A - diluent, B - adjuvant
• C. A - toxoid, B - adjuvant
• D. A - toxoid, B - diluent

Hint:

In vaccine production, toxoids are altered toxins, and adjuvants are used to enhance the immune response.

Answer 1

The Correct Option is C

Step 1: Understanding the components.
In vaccine production, toxins (such as tetanus or diphtheria toxin) are altered to become "toxoids," which can no longer cause disease but still stimulate the immune system to generate an immune response. These toxoids are mixed with adjuvants, which enhance the immune response.
Step 2: Analyzing the options.
(A) A - adjuvant, B - toxoid: Incorrect — Adjuvants enhance immune response, but they are not the altered toxin. The toxoid is the altered toxin, not adjuvant.
(B) A - diluent, B - adjuvant: Incorrect — A diluent is used to dilute the vaccine, but it is not the toxin.
(C) A - toxoid, B - adjuvant: Correct — Toxoids are the altered toxins, and adjuvants are mixed with them to improve immune response.
(D) A - toxoid, B - diluent: Incorrect — A diluent is not involved in enhancing immune response.
Step 3: Conclusion.
The correct answer is (C) A - toxoid, B - adjuvant, as the altered toxins (toxoid) are mixed with adjuvants to enhance immune response.