ANSWER: Sugarcane
Explanation:
At present, the most obvious and reliable source of bio-ethanol in India is sugarcane. Ethanol is produced from cane molasses, a by-product of the sugar production process. Some of it can come from sources other than molasses, such as cellulosic ethanol, made from bagasse or sugarcane tops. The government’s current Ethanol Blending Policy mandates five per cent blending of ethanol with petrol, though in reality the average ethanol blending achieved has been just two per cent. Ethanol, unlike petrol, is prone to oxidation and this can cause gum-like sediments to accumulate in various engine parts. Ethanol also reacts with other materials in the car, such as rubber, and this causes degradation.