Hey Sadik,
Open Schooling (NIOS board) board examinations is conducted by central government, these students can apply in any institution or university in India as well as in Abroad.
Bachelor in Pharmacy is a 4-year undergraduate degree course which includes drug preparation and dispensing. For Admission to this course, you need to fulfill some eligibility criterias, those are :

• A individual must have passed 12th examinations from any recognized board with Physics, Chemistry and Biology /Mathematics as compulsory subjects
• Individual must have scored minimum 50% marks in qualifying examination (12th grade)
• A individual must have minimum 17 years of age.

So you are perfectly eligible for admission to the course (B.Pharmacy) in any university.
All the Best!