Hello aspirant,
I am here for helping you .......
As now  you are pursuing your class 12th from NIOS board and want to go for D- pharmacy.

D.Pharm Course - Eligibility

You will have to pass in any of the following examination with Physics, Chemistry, Mathematics/Biology (PCM or PCB or PCMB)

1) Intermediate examination in science. (PCM or PCB)
2)The 1 st year of 3 years a degree course in science. (PCM or PCB)
3) 10+2 examination (academic stream) in science. (PCM or PCB)
4) Pre-degree examination (PCM or PCB) or
5) Any other qualification approved by the P.C.I.
equivalent to any of the above examination.

Now knowing more about D-pharma course by JEECUP score  you can go on the link which I am providing you below:
https://engineering.careers360.com/articles/jeecup
For having an idea of  the chances of your admission, you can have a probable idea from the previous year cutoff records for which I will suggest you to search it on the official website given below:
https://jeecup.nic.in/cms/public/home.aspx
I hope it will be beneficial for you......
For more queries you can upvote my answer and can ask in the comment section below....
Best of luck......