Quantity of Solaro 50 WP for 2 hectares maize to supply atrazine at 0.75 kg/ha:

Correct option is B

To apply atrazine at 0.75 kg/ha over 2 hectares, you need:
0.75 kg/ha × 2 ha = 1.5 kg atrazine
Solaro 50 WP contains 50% active ingredient, so required amount =
1.5 kg ÷ 0.5 = 3.0 kg of Solaro 50 WP