Choose the correct statement from the following:
(i) CNG is an ideal fuel.
(ii) CNG on burning creates oxides of Nitrogen and sulphur in less quantity.
(iii) The calorie value of CNG is more than hydrogen.
(iv) CNG is comparatively a clean fuel.

Options

A. (i), (ii) and (iii)
B. (ii), (iii) and (iv)
C. (i), (iii) and (iv)
D. (i), (ii) and (iv)

Explanation

To solve the question, we need to evaluate each of the statements provided about Compressed Natural Gas (CNG) and determine which ones are correct.

### Step-by-Step Solution:

1. **Evaluate Statement (i): CNG is an ideal fuel.**
- An ideal fuel should be easily available, cheap, eco-friendly, and should not produce harmful substances when burned. CNG does produce harmful substances, such as oxides of nitrogen and sulfur, which are not good for the environment. Therefore, this statement is **incorrect**.

2. **Evaluate Statement (ii): CNG on burning creates oxides of nitrogen and sulfur in less quantity.**
- While CNG does produce oxides of nitrogen and sulfur, it does so in lesser quantities compared to other fossil fuels like coal and oil. This makes this statement **correct**.

3. **Evaluate Statement (iii): The calorie value of CNG is more than hydrogen.**
- The calorific value refers to the amount of energy released during combustion. Hydrogen has a higher calorific value than CNG. Therefore, this statement is **incorrect**.

4. **Evaluate Statement (iv): CNG is comparatively a clean fuel.**
- CNG is considered a cleaner fuel compared to petrol and diesel because it produces fewer harmful emissions when burned. Thus, this statement is **correct**.

### Conclusion:
Based on the evaluations:
- Statement (i) is incorrect.
- Statement (ii) is correct.
- Statement (iii) is incorrect.
- Statement (iv) is correct.

Thus, the correct statements are (ii) and (iv). If the question asks for the correct statements, the answer would include these two.

### Final Answer:
The correct statements are:
- (ii) CNG on burning creates oxides of nitrogen and sulfur in less quantity.
- (iv) CNG is comparatively a clean fuel.