Match Column-I with Column-II and select the correct answer from codes given below.
`{:("Column I","Column II"),("A.Allergy","i) Activation of B-cell"),("B. Helper T- cells","ii) Immunotherapy"),("C. AIDS virus","iii) Carcinogens"),("D.X-rays","iv) IgE"),("E. Treatment of Cancer","v) Single Stranded RNA"):}`

Options

A. `A-iv, B-i, C-v, D-iii, E-ii`
B. `A-ii, B-i, C-v, D-iii, E-iv`
C. `A-iv, B-v, C-iii, D-ii, E-i`
D. `A-ii, B-v, C-iii, D-i, E-iv`

Answer

To solve the matching question, we will go through each item in Column I and find the corresponding item in Column II step by step.

### Step-by-Step Solution:

1. **Match A: Allergy**
- Allergy is a hypersensitive immune response against a particular antigen. In this case, the immune system produces IgE antibodies, which are responsible for allergic reactions.
- **Match:** A (Allergy) → iv (IgE)

2. **Match B: Helper T-cells**
- Helper T-cells (TH cells) play a crucial role in the immune response by activating B-cells to produce antibodies against pathogens.
- **Match:** B (Helper T-cells) → i (Activation of B-cell)

3. **Match C: AIDS virus**
- The AIDS virus, known as HIV (Human Immunodeficiency Virus), is a retrovirus that has single-stranded RNA as its genetic material.
- **Match:** C (AIDS virus) → v (Single Stranded RNA)

4. **Match D: X-rays**
- X-rays are known to cause mutations in cells, which can lead to cancer. These cancer-causing agents are referred to as carcinogens.
- **Match:** D (X-rays) → iii (Carcinogens)

5. **Match E: Treatment of Cancer**
- Immunotherapy is a treatment for cancer that involves using immune cells to attack cancer cells. This is a method of treating cancer.
- **Match:** E (Treatment of Cancer) → ii (Immunotherapy)

### Final Matches:
- A → iv (IgE)
- B → i (Activation of B-cell)
- C → v (Single Stranded RNA)
- D → iii (Carcinogens)
- E → ii (Immunotherapy)

### Answer Code:
Based on the matches, the correct answer code is 1.

---