Correct option is C
The correct answer is: (c) VAM
A herbicide is a chemical substance used to control or destroy unwanted vegetation, particularly weeds.
VAM (Vesicular-Arbuscular Mycorrhiza):
Category: Not a herbicide.
Usage: VAM is a beneficial fungus that forms a symbiotic relationship with plant roots, enhancing nutrient and water uptake.
Significance: Promotes sustainable agriculture by reducing chemical fertilizer dependency.
Additional Information:
2,4D:
Category: Herbicide.
Usage: A widely used selective herbicide for controlling broadleaf weeds without harming most grasses.
Action: Mimics natural plant hormones to disrupt growth.
DCMU:
Category: Herbicide.
Usage: Also known as Diuron, DCMU inhibits photosynthesis by blocking the electron transport chain in photosystem II.
Action: Effective in agricultural fields and water systems to control algae and weeds.
Agent Orange:
Category: Herbicide.
Usage: A defoliant used during the Vietnam War to clear dense vegetation. It contains harmful dioxins and is infamous for its adverse environmental and health effects.
Controversy: Its use has been heavily criticized due to its long-term toxic effects.