Hello Meher,

No, you don't need to be from a specific college during 11 and 12 for entering

In NDA(National Defence Academy).

You need only to crack the NDA Exam to get into itafter

your class 12.

You can also visit careers360 regarding it-

https://competition.careers360.com/articles/nda-eligibility-criteria

Thank You.

Hope it helps.

No ,you just have to give NDA EXAMiNATION  and will have to clear this exam for getting admission in NDA.

Thank you