first Indian airline company that used biofuel as ATF

Which is the first Indian airline company that used biofuel as ATF in August 2018?
A. Jet Airways

B. Vistara

C. Air India

D. SpiceJet

E. None of the above/More than one of the above

Answer –  D
Explanation: Spicejet  flight powered by indigenously produced aviation biofuel based on patented technology of CSIR-IIP Dehradun was flagged off from Dehradun  in aug 2018

CSIR-Indian Institute of Petroleum (IIP) manufactured 330 kg of biofuel for 45 minutes Dehradun-Delhi flight.

The flight burnt a mix of 75% traditional Aviation Turbine Fuel (ATF) and 25% oil extracted from the Jatropha plant. International standards permit a blend rate of upto 50% biofuel with ATF.