WBCS.LIVE practice question

In the context of proposals to the use of hydrogen-enriched CNG (H-CNG) as fuel for buses in public transport, consider the following statements: 1.The main advantage of the use of H-CNG is the elimination of carbon monoxide emissions. 2.H-CNG as fuel reduces carbon dioxide and hydrocarbon emissions. 3.Hydrogen up to one-fifth by volume can be blended with CNG as fuel for buses. 4.H-CNG makes the fuel less expensive than CNG. Which of the statements given above is/are correct?

Solve this multiple-choice question and check the correct answer with its explanation below.