The eligibility of the B.Ed course is that the candidate needs to have at least 50% marks in there UG. Now without this you can't do the BEd course. The thing you can do is to visit your university, and find if there are any kind of improvement examination (this is not available for most university), if its available, then on giving the examination you can achieve marks above 50%.

Without 50% marks you can't do BEd.

For more information regarding BEd consider the link below:

https://www.careers360.com/courses/b-ed-bachelor-of-education

I hope this helps. Wish you a great day!