Match the following
`{:("List I" ,"List II"),("A) Herbicide","I) Oxidizing nature "),("B) Photochemical" ,"II) Benzopyrene smog "),( "C) London smog ","III) " NaClO_(3) ),("D) Carcinogenic substance " ,"iv) Reducing nature "):}`
The correct match is

Options

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

Answer

To solve the matching question, we need to analyze each item in List I and find the corresponding item in List II based on their definitions and characteristics.

### Step-by-Step Solution:

1. **Herbicide (A)**:
- A herbicide is a substance used to kill unwanted plants (weeds).
- The herbicide mentioned in the transcript is Sodium Chlorate (NaClO3), which is a non-selective herbicide.
- **Match**: A) Herbicide → III) NaClO3

2. **Photochemical (B)**:
- Photochemical smoke is known for its oxidizing nature.
- It is formed from reactions involving nitrogen oxides and volatile organic compounds in the presence of sunlight, leading to the formation of ozone, which is a strong oxidizing agent.
- **Match**: B) Photochemical → I) Oxidizing nature

3. **London smog (C)**:
- London smog is characterized by the presence of sulfur dioxide and high humidity, which leads to the formation of sulfuric acid (H2SO4).
- It is associated with a reducing atmosphere due to the high concentration of sulfur dioxide.
- **Match**: C) London smog → IV) Reducing nature

4. **Carcinogenic substance (D)**:
- Carcinogenic substances are those that can cause cancer.
- Benzopyrene is identified as a carcinogenic substance and is known to have harmful effects on human health.
- **Match**: D) Carcinogenic substance → II) Benzopyrene smog

### Final Matches:
- A) Herbicide → III) NaClO3
- B) Photochemical → I) Oxidizing nature
- C) London smog → IV) Reducing nature
- D) Carcinogenic substance → II) Benzopyrene smog

### Answer:
The correct matches are:
- A - III
- B - I
- C - IV
- D - II