. . . . . . . . of congress grass (Active principle is parthenin) have the pesticide properties.

Answer: Option B

Leaf extracts of congress grass (Active principle is parthenin) have the pesticide properties.
Parthenium hysterophorus is a species of flowering plant in the family Asteraceae. It is native to the American tropics. The plant causes dermatitis and respiratory malfunction in humans, and dermatitis in cattle and domestic animals. The main substance responsible is parthenin, which is dangerously toxic.
The plant causes dermatitis and respiratory malfunction in humans, and dermatitis in cattle and domestic animals. The main substance responsible is parthenin, which is dangerously toxic.