With reference to green hydrogen, consider the following statements : 1. It can be used directly as a fuel for internal combustion. 2. It can be blended with natural gas and used as fuel for heat or power generation. 3. It can be used in the hydrogen fuel cell to run vehicles. How many of the above statements are correct?

All three statements are correct because green hydrogen is a versatile energy carrier that can be directly combusted in modified internal combustion engines, blended with natural gas for heating and power, and used in fuel cells to power electric vehicles. The most tempting wrong option is (b), as candidates often incorrectly assume hydrogen is exclusively used in fuel cells and cannot be used for direct combustion or blending in existing infrastructure. The core concept tested is the multi-sectoral utility and technological flexibility of hydrogen as a clean energy alternative.