Hello Mohib,

              To appear for JEE Mains exams, NTA ke eligibility citeria ke hisab se aapko apne saare subject me paas hona hai. Lekin NIT/IIT/GFTI me admission ke liye aapko 12th boards me more than 75% laane ki zaroorat hai.Agar aap SC/ST category me aate hai to apko 65% ya zyada laane ki zaroorat hai. Aapko  apne Board ke top 20 percentile me aana chahiye agar aap JEE Mains ke through B. Tech me admission lena chahte ho to.

Lekin agar aapko B. Arch me admission lena hai to 12th me minimum 50% laane ki zaroorat hai.

         Agar aapke 12th me isse kam % hai to aap 12th ka exam agle saal phir se de sakte hai- imrovement exam de sakte hai. 

Aur jaankari ke liye, is link pe jaiye:

https://engineering.careers360.com/articles/jee-main-eligibility-criteria

Best Wishes!