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8.Microbes in Human Welfare
normal
Pyrethoids are of
A
Synthetic origin
B
Plant origin
C
$(a)$ and $ (b)$ both
D
Animal origin
Solution
(b)They are synthetic derivatives of pyrethrum having broad spectrum effect, pyrethrum is naturally got from inflorescence of chrysanthemum species like C. marshalli, C. cinerarifolium and C. Coccineum.
Standard 12
Biology
