Who among the following unveiled ‘Ethanol 100’, an automotive fuel aimed at reducing emissions and promoting sustainability?

Correct option is B

Union Petroleum and Natural Gas Minister Hardeep Singh Puri unveiled ‘Ethanol 100’, a fuel blend initiative under India's biofuel roadmap. It promotes green energy by using 100% ethanol-based fuel to reduce emissions and dependence on fossil fuels.
Explanation of options: (a) ✘ Though Prime Minister Modi promotes green policies, this specific initiative was launched by the Petroleum Minister. (b) ✔ Hardeep Singh Puri is the correct answer as he heads the Petroleum Ministry and launched this project. (c) ✘ Rajnath Singh is the Defence Minister and not related to this particular scheme. (d) ✘ Amit Shah, being the Home Minister, was not associated with the unveiling of Ethanol 100.