Match the following
List - I
A) `SO_(2), NO_(3)` in air
B) Excess of phosphates in water ponds
(C)
Excesss of `F^(-)` ions in drinking water
D) Excess of organic pollutants
List II
I) Bones and teeth get effected
II) pH of rainwater decreases
III) DO content decreases
IV) Eutrophication
The correct match is

Options

A. `{:(A,B,C,D),(IV,III,I,II):}`
B. `{:(A,B,C,D),(IV,II,I,III):}`
C. `{:(A,B,C,D),(II,IV,I,III):}`
D. `{:(A,B,C,D),(IV,I,III,II):}`

Answer

To solve the matching question, we need to connect the items from List I with the appropriate items from List II based on their environmental impacts. Let's analyze each item step by step.

### Step 1: Analyze Item A - SO₂ and NO₃ in air
- **Explanation**: Sulfur dioxide (SO₂) and nitrogen oxides (NO₃) are pollutants that can lead to acid rain. When these gases react with water vapor in the atmosphere, they form sulfuric acid and nitric acid, respectively. This process decreases the pH of rainwater.
- **Match**: Therefore, A matches with II) pH of rainwater decreases.

### Step 2: Analyze Item B - Excess of phosphates in water ponds
- **Explanation**: An excess of phosphates in water bodies leads to a phenomenon called eutrophication. This process results in excessive growth of algae, which consumes dissolved oxygen (DO) in the water, leading to a decrease in oxygen levels that aquatic life needs to survive.
- **Match**: Thus, B matches with IV) Eutrophication.

### Step 3: Analyze Item C - Excess of F⁻ ions in drinking water
- **Explanation**: High concentrations of fluoride ions (F⁻) in drinking water can lead to dental and skeletal issues. Specifically, excessive fluoride can cause dental fluorosis, which affects the enamel of teeth, and can also lead to problems with bones.
- **Match**: Hence, C matches with I) Bones and teeth get affected.

### Step 4: Analyze Item D - Excess of organic pollutants
- **Explanation**: Organic pollutants in water bodies can lead to a decrease in dissolved oxygen (DO) levels. These pollutants are often biodegradable and consume oxygen as they decompose, which can harm aquatic organisms.
- **Match**: Therefore, D matches with III) DO content decreases.

### Final Matching
Now we can summarize the correct matches:
- A) SO₂, NO₃ in air → II) pH of rainwater decreases
- B) Excess of phosphates in water ponds → IV) Eutrophication
- C) Excess of F⁻ ions in drinking water → I) Bones and teeth get affected
- D) Excess of organic pollutants → III) DO content decreases

### Final Answer
The correct match is:
- A - II
- B - IV
- C - I
- D - III