Yes ,

You can apply for NDA 2  , your result of NDA 1 does not matter in case of NDA 2  .

Since you have given NDA 1 you must be having a pretty good idea about the examination pattern and the types of questions asked , now you also have an good enough idea about your weakness so work on it and improve  your performance next time. Solve as many as question papers you can solve as previous year questions are the most useful and important material for preparation .

For more details about NDA examinations visit :

https://competition.careers360.com/exams/nda

Hope this helps.