The Correct answer is Dehradun to DelhiDehradun to Delhi?The first biofuel flight in India will fly from Dehradun (the capital of Uttarakhand) to Delhi.SpiceJet's turboprop Q-400 plane took part in the world's first biofuel test flight.With this, India will join a select group of countries that have successfully operated flights using alternative energy sources such as biofuel.These test flights have already taken place in developed countries such as Canada, Australia, and the United States.India will be the first country in the developing world to do a biofuel test flight.Additional InformationVegetable oils, recycled grease, algae, and animal fat are used to make biofuel.India is attempting to promote biofuels in order to lessen its reliance on fossil fuels and imports.On World Biofuel Day August 10, 2018, the Ministry of New and Renewable Energy issued the National Policy on Biofuels 2018.It has also set a goal of blending 20% ethanol into gasoline by 2030.