Dear Manish,

As per previous years records, for clearing written stage you need to have atleast 320-340+ marks out if 900 marks with atleast 25% in each subject. And final cutoff out of 1800, you must have atleast 710-720+ marks. And there is no news till now regarding any changes in syllabus of NDA 2021. Click below to see the syllabus of NDA 2021:

https://competition.careers360.com/articles/nda-exam-pattern

Thankyou!