Hello,

Firstly to specify there is no BSc program in JNU and there is only BA Hons. You can do MSc there only.

The JNU Admission 2021 will be started from the month of March 2021. The JNU Admission 2021 will be offered by the Taking the Entrance Test termed as JNUEE.

• JNUEE is the University level entrance test which is organized to offer admission into the Professional courses in the field of the Law, Engineering, Humanities, Science, etc.
• The weightage of marks is 70% and 30% for the Written Examination and the Viva Voce (wherever prescribed) respectively
• The minimum age limit is 17 years as on 1 October 2020 for BA (Hons.) 1st year programme. There is no age bar for any other programme.

https://university.careers360.com/articles/jnu-courses

You can refer to this link for more information

Hope this helps!!!