Is BA in Assamese course available in Tezpur University?

Nah, not happening.

• Tezpur only offers M.A. in Assamese — so if you're still in undergrad phase, you'll need to look elsewhere.

Try these instead:

• Cotton University (Guwahati)

• Dibrugarh University

• Gauhati University

They've got solid Assamese departments if you want to do your UG in the language.