Hello Tsewang Dolma!

JNU Delhi takes admission in Engineering courses through JEE MAINS rank only. You have to appear in JEE MAINS now and score well. You have to take admission through the counselling process conducted after JEE MAINS & ADVANCED. Last year it took admission through JOSSA & CSAB counselling. It may be same this year too. Stay in touch with the website of JNU Delhi for being aware.

Hope that helps!

All the best!