A commonly recommended pre-emergence herbicide for sugarcane is:

Correct option is B

· Pendimethalin 1–1.5 kg a.i./ha is the most widely recommended pre-emergence herbicide in sugarcane by ICAR–IISR & SAUs.
· Controls annual grasses + broadleaf weeds.
Why other options are wrong
· (a) Atrazine is more common in maize; selective in C4 crops but less used in sugarcane pre-emergence.
· (c) Paraquat = non-selective contact herbicide used only for directed spraying, not pre-emergence.
· (d) 2,4-D = selective post-emergence broadleaf herbicide, not pre-emergence.