The DULLB eligibility criteria states:

• General category: You need to secure a minimum of 50 per cent marks in the qualifying degree-level examination.
• OBC: You need to secure a minimum of 50 per cent marks in the qualifying degree-level examination.
• Reserved categories(SC/ST): You need to secure a minimum of 45 per cent marks in the qualifying degree-level examination.

Also you can applly for DULLB exam, if you are less then 30 years of age.

Theefore if you meet the above criterias you are eligible for DULLB exam.

Good Luck.