Match the terms given in list I with their description in list II and select the correct option from the codes given below.
`{:("List I", "List II"), ("Helper T-cells", 1. "Cells that are active in production of antibodies"),("Plasma cells", 2. "Activate T or B-lymphocytes to become plasma cells"),("Killer T-cells", 3. "Protein produced by virus infected cell"),("Interferon", 4. "Combine with antigen causing lysis and release of cytokins"):}`

Options

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

Answer

To solve the matching question, we need to pair each term from List I with the correct description from List II. Let's go through each term step by step.

### Step 1: Identify Helper T-cells
Helper T-cells are crucial in the immune response as they activate other immune cells. They specifically activate B-lymphocytes to produce plasma cells.

**Match:**
- Helper T-cells → 2. Activate T or B-lymphocytes to become plasma cells.

### Step 2: Identify Plasma Cells
Plasma cells are derived from B-lymphocytes and are primarily responsible for producing antibodies, which are essential for the immune response.

**Match:**
- Plasma cells → 1. Cells that are active in production of antibodies.

### Step 3: Identify Killer T-cells
Killer T-cells (also known as cytotoxic T-cells) are involved in directly killing infected cells. They work by combining with antigens on the surface of infected cells, leading to the lysis (breaking down) of these cells and the release of cytokines.

**Match:**
- Killer T-cells → 4. Combine with antigen causing lysis and release of cytokines.

### Step 4: Identify Interferon
Interferons are proteins produced by virus-infected cells. They play a role in signaling neighboring cells to enhance their antiviral defenses.

**Match:**
- Interferon → 3. Protein produced by virus infected cell.

### Final Matching Summary:
- A (Helper T-cells) → 2
- B (Plasma cells) → 1
- C (Killer T-cells) → 4
- D (Interferon) → 3

### Conclusion:
The correct option is:
- A: 2, B: 1, C: 4, D: 3.