Which one of the following formulations of a pesticide would be most suitable for spraying in a standing crop of rice?

Answer: Option A

Endosulfan EC formulations of a pesticide would be most suitable for spraying in a standing crop of rice.
Endosulfan is an off-patent organochlorine insecticide and acaricide that is being phased out. It became a highly controversial agrichemical due to its acute toxicity, potential for bioaccumulation, and role as an endocrine disruptor.
Endosulfan has been used in agriculture around the world to control insect pests including whiteflies, aphids, leafhoppers, Colorado potato beetles and cabbage worms.