Correct option is C
The correct answer is (C) (A) - (I), (B) - (IV), (C) - (III), (D) - (II)
Explanation:
• Phenoxyacetics (2,4-D): One of the oldest and most common systemic herbicides used to control broad-leaved weeds.
• Ureas (Isoproturon): A substituted urea used widely in wheat.
• Triazines (Atrazine): A heterocyclic nitrogen compound used primarily in Maize and Sugarcane.
• Arsenicals (MSMA): Monosodium methyl arsenate is an organic arsenical herbicide.
Information Booster:
• Chemical classification is vital for understanding herbicide mode of action and selectivity.
• 2,4-D mimics auxin (plant hormone) causing uncontrolled growth and death.
Additional Knowledge:
• Option (B) is incorrect because Isoproturon belongs to Ureas, not Triazines.
• Arsenicals are less commonly used today in many regions due to environmental toxicity concerns.