I want to be a biology teacher so for my bsc degree i want to study both zoology and botany with 3rd subject that I will leave in 3rd year . But all course that I have seen of du,bhu I haven't seen any with zoology with botany always with chemistry but I don't want to study chemistry

Yes, in many central universities like University of Delhi and Banaras Hindu University, Biology-based B.Sc combinations commonly include Botany, Zoology, and Chemistry in the initial semesters.

Under NEP-based structures, students in some programs can later specialize/major more deeply in a single subject like Botany or Zoology in advanced semesters instead of continuing all three equally.

However, the exact flexibility to “drop” Chemistry depends on the university and specific B.Sc program structure.