Which one of the following category of seeds is not being produced in India?

Answer: Option A

Nucleus seeds are the category of seeds that are not being produced in India.
Nucleus Seed is the initial amount of pure seed of improved variety or parental lines of a hybrid produced under the supervision of the plant breeder who has evolved that variety or hybrid.
The nucleus seed is genetically cent percent pure and does not contain other physical impurities. These are not produced in India.