To be eligible for a Diploma degree at Blue Mountains Group of Colleges, Dehradun, candidates must have completed their 10+2 education from a recognized board or equivalent. Additionally, they must meet the minimum percentage requirement set by the college for admission. Some programs may have specific subject requirements, so applicants are advised to check the course details before applying. Candidates may also need to appear for an entrance exam or interview as part of the admission process. Overall, students with a strong academic background and a passion for their chosen field of study are encouraged to apply for the Diploma programs at Blue Mountains Group of Colleges, Dehradun.