Consider the following statements and select the option which correctly identifies true (T) and false (F) ones.
(i)Air pollution from motor vehicles can be reduced by using CNG as fuel.
(ii) Excess carbon monoxide present in the atmosphere traps a lot of heat and leads to warming of Earth's surface.
(iii) Smog is formed by condensation of water vapour with `H_2S` and `SO_2` over dust or smoke particles
(iv) Kyoto protocol was signed to reduce the emission of greenhouse gases.

Options

A. (i)-T,(ii)-F,(iii)-T,(iv)-F
B. (i)-T,(ii)-F,(iii)-F,(iv)-T
C. (i)-F,(ii)-F,(iii)-T,(iv)-T
D. (i)-T,(ii)-F,(iii)-T,(iv)-T

Explanation

To solve the question, we need to evaluate each of the four statements provided and determine whether they are true (T) or false (F).

### Step-by-Step Solution:

1. **Evaluate Statement (i)**: "Air pollution from motor vehicles can be reduced by using CNG as fuel."
- **Analysis**: Compressed Natural Gas (CNG) is a cleaner alternative to petrol and diesel. It produces fewer pollutants when burned. Therefore, this statement is **True (T)**.

2. **Evaluate Statement (ii)**: "Excess carbon monoxide present in the atmosphere traps a lot of heat and leads to warming of Earth's surface."
- **Analysis**: While carbon monoxide is a pollutant, it is carbon dioxide (CO2) that is primarily responsible for trapping heat and contributing to global warming. Therefore, this statement is **False (F)**.

3. **Evaluate Statement (iii)**: "Smog is formed by condensation of water vapor with H2S and SO2 over dust or smoke particles."
- **Analysis**: Smog is indeed formed when water vapor condenses with pollutants such as sulfur dioxide (SO2) and particulates in the air. This statement is **True (T)**.

4. **Evaluate Statement (iv)**: "Kyoto protocol was signed to reduce the emission of greenhouse gases."
- **Analysis**: The Kyoto Protocol is an international treaty that commits its parties to reduce greenhouse gas emissions. Therefore, this statement is **True (T)**.

### Summary of Evaluations:
- (i) T
- (ii) F
- (iii) T
- (iv) T

### Final Answer:
The correct identification of the statements is:
- (i) True (T)
- (ii) False (F)
- (iii) True (T)
- (iv) True (T)