Unfortunately, with a 40% score in your 12th-grade exams, you may not have chance for applying for a B.Ed program directly. Most universities and colleges in India require applicants to have a bachelor's degree with a minimum of 50-55% marks to be eligible for B.Ed programs. The 12th-grade percentage is typically not considered if you have a bachelor's degree meeting the minimum marks criteria .

You will have to pursue one bachelor's degree and ensure you meet the eligibility criteria for B.Ed after that.

Good luck!