The correct option is A A-II; B-I; C-IV; D-III
Statins are drugs that are prescribed by doctors that lowers the level of cholesterol, they also prevent heart attack and stroke. Ethanol is also called ethyl alcohol is a volatile, colourless liquid which is naturally produced by the fermentation of sugars by yeast.
Dung is the waste product of animal species which may be collected and used to produce biogas to generate heat and electricity.
Bt-cotton is a genetically modified pest resistant plant variety which produces an insecticide to combat ball worm.