Match the following .
`{:(" Column-I "," Column-II "),("A) Necrotic spots ","1) Noise pollution "),("B) Irregular heartbeat ","2) Nox"),("C) Destroys ciliary epithelium","3) Aerosoles"),("D) Sleeplessness","4) " SO_(2)""):}`

Options

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

Answer

To solve the matching question, we need to pair each item in Column-I with the correct item in Column-II based on their relationships. Here’s a step-by-step solution:

### Step 1: Analyze Column-I
1. **Necrotic spots** - These are areas of dead tissue, often resulting from a lack of blood flow or damage.
2. **Irregular heartbeat** - This refers to an abnormal heart rhythm, which can be caused by various factors.
3. **Destroys ciliary epithelium** - Ciliary epithelium is a layer of cells that helps in the movement of mucus and other substances in the respiratory tract.
4. **Sleeplessness** - This is a condition of being unable to sleep, which can be caused by various environmental factors.

### Step 2: Analyze Column-II
1. **Noise pollution** - This is unwanted or harmful sound in the environment.
2. **NOx** - This refers to nitrogen oxides, which can have harmful effects on health and the environment.
3. **Aerosols** - These are tiny particles or droplets suspended in the air, which can affect health.
4. **SO₂ (Sulfur Dioxide)** - This is a gas that can cause respiratory problems and damage to the respiratory system.

### Step 3: Match the Items
1. **Necrotic spots (A)**: These are caused by **NOx (2)**, as nitrogen oxides can lead to various health issues.
- Match: A → 2
2. **Irregular heartbeat (B)**: This can be caused by **Aerosols (3)**, which can affect heart rhythm.
- Match: B → 3
3. **Destroys ciliary epithelium (C)**: This is caused by **SO₂ (4)**, which can damage respiratory tissues.
- Match: C → 4
4. **Sleeplessness (D)**: This is often caused by **Noise pollution (1)**, which can disrupt sleep.
- Match: D → 1

### Final Matches
- A → 2 (Necrotic spots → NOx)
- B → 3 (Irregular heartbeat → Aerosols)
- C → 4 (Destroys ciliary epithelium → SO₂)
- D → 1 (Sleeplessness → Noise pollution)

### Conclusion
The correct matches are:
- A) Necrotic spots → 2) NOx
- B) Irregular heartbeat → 3) Aerosols
- C) Destroys ciliary epithelium → 4) SO₂
- D) Sleeplessness → 1) Noise pollution

Thus, the answer is **A2, B3, C4, D1**.