Multiple choice Which of the following is not an insect repellent ? N,N-Diethyl-meta-toluamide Icaridin Indulines Citronella oil Reveal answer Fill a bubble to check yourself C Correct answer Explanation Indulines are a series of dyestuffs of blue, bluish-red or black shades, formed by the interaction of para-amino azo compounds with primary monoamines in the presence of a small quantity of a mineral acid. These are not the insect repellents .