Pick out the wrong statement about the smoking tendency of various hydrocarbon constituents of kerosene.

• Smoking tendency of hydrocarbons increases in the order : paraffins → isoparaffins → naphthenes → aromatics.
• Smoking tendency of paraffins increases with decrease in its molecular weight.
• Smoking tendency of naphthenes decreases with its increasing molecular weight & also on addition of double bond.
• Smoking tendency of aromatics decreases with increase in its molecular weight.