Which one of the following sequences is being used in a combination seed treatment?

Correct option is C

Correct option (c) Fungicide → Insecticide → Rhizobium
· Fungicide applied first to control seed-borne fungi.
· Insecticide applied next.
· Rhizobium is applied last to avoid chemical toxicity.
Other options:
· (a), (b), (d) – Harmful to Rhizobium if applied earlier.