Hi Mainu,
You will have to give your B. Ed exam and basis your score, you will be able to take admission to Deomornoi College. The minimum eligibility criteria for admission to B. Ed is graduate in any discipline from a recognised board.
You can pursue your B. Ed course through full-time, distance or correspondence mode. Deomornoi College offers B. Ed in the ragular mode only. Since you are from Assam, you may want to check out a few more B. Ed colleges in Assam. Some of them include:
Good luck!!