Question

Match the cells in Column I with their primary function in Column II. 

 

• A. A-2, B-1, C-3, D-4
• B. A-3, B-2, C-1, D-4
• C. A-2, B-3, C-1, D-4
• D. A-4, B-1, C-3, D-2

Hint:

Create a quick reference table for immune cells and their defining functions or markers. Associating "Plasma" with "Antibodies" and "CD8" with "Cytotoxic" will help you quickly solve matching questions.

Answer 1

The Correct Option is A

Step 1: Understanding the Concept:
This question tests your knowledge of the primary functions of various cells of the immune system.

Step 2: Detailed Explanation:
Let's evaluate each cell type carefully.
- Plasma cells (A): These are terminally differentiated B lymphocytes that act as biological factories to produce and secrete large volumes of antibodies.
Thus, A matches with 2 (Antibody secretion).
- CD8$^+$ T cells (B): Also known as cytotoxic T lymphocytes (CTLs), their main function is to recognize and directly kill infected cells or tumor cells.
Thus, B matches with 1 (Cytotoxic killing).
- Dendritic cells (C): These are professional antigen-presenting cells (APCs) that capture, process, and present antigens to T cells to initiate adaptive immune responses.
Thus, C matches with 3 (Antigen presentation).
- Mast cells (D): These cells reside in tissues and contain granules rich in histamine and heparin.
Upon activation (e.g., during allergic reactions), they degranulate and release histamine.
Thus, D matches with 4 (Histamine release).

Step 3: Final Answer:
Matching all these gives the sequence: A-2, B-1, C-3, D-4.
This perfectly corresponds to option (A).