Match items in column I and column II and choose the correct option :
`{:("Column I","Column II"),("A. UV","i) Biomagnification"),("B. Biodegradable Organic matter","ii) Eutrophication"),("C. DDT I","iii) Snow blindness"),("D. Phosphates","iv) BOD"):}`
The correct match is

Options

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

Answer

To solve the matching question, we will analyze each item in Column I and find the corresponding match in Column II based on the information provided.

### Step-by-Step Solution:

1. **Match A. UV:**
- UV stands for Ultraviolet radiation, which can cause a painful eye condition known as snow blindness.
- **Match:** A (UV) → iii (Snow blindness)

2. **Match B. Biodegradable Organic Matter:**
- When biodegradable organic matter enters water bodies, it is decomposed by bacteria, which consume oxygen. The amount of oxygen consumed in this process is referred to as Biochemical Oxygen Demand (BOD).
- **Match:** B (Biodegradable Organic Matter) → iv (BOD)

3. **Match C. DDT:**
- DDT (Dichlorodiphenyl Trichloroethane) is a toxic substance that accumulates in the food chain, leading to a process called biomagnification, where the concentration of the toxin increases at each trophic level.
- **Match:** C (DDT) → i (Biomagnification)

4. **Match D. Phosphates:**
- Phosphates contribute to the excessive growth of algae in water bodies, leading to a phenomenon known as eutrophication, which depletes oxygen levels and harms aquatic life.
- **Match:** D (Phosphates) → ii (Eutrophication)

### Final Matches:
- A → iii (Snow blindness)
- B → iv (BOD)
- C → i (Biomagnification)
- D → ii (Eutrophication)

### Correct Option:
The correct matches are:
- A: iii
- B: iv
- C: i
- D: ii

Thus, the correct option is **Option 3**.

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