The fuels in order of decreasing knock tendency for spark ignition engines are ___________
(a) paraffins, aromatics, naphthenes
(b) paraffins, naphthenes, aromatics
(c) naphthenes, aromatics, paraffins
(d) none of the mentioned
This question was posed to me during an online exam.
The doubt is from Dual Fuel Operations topic in section Conventional and Alternate Fuels of IC Engine