You havent mentioned your highest qualification and the course you studied in Acharya Nagarjuna University. You also haven't mentioned whether you have pursued this course through regular mode or through Distance mode. The process is different for both the modes. If you completed your course through full time, you need to contact the administration. If you completed the course through Distance education, you need to take a copy of all your marks sheets, previous exams certificates, get them attested and take a DD and send it to ANUCDE. The amount is different for each course. You need to check with the Admissions department of the University for this.