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Question
The fuels in order of decreasing knock tendency for spark ignition engines are
Options:
A .  paraffins, aromatics, napthenes
B .  paraffins, napthenes, aromatics
C .  napthenes, aromatics, paraffins
D .  napthenes, paraffins, aromatics
Answer: Option B
Answer: (b).paraffins, napthenes, aromatics

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