I'm a student of standard 9, so how to prepare myself from now onwards to crack NDA examination?

i want to crack NDA examination but i dont know how to,as im in class 9 so please guide me. or:i want to crack NDA examination but i dont know how to,

i want to crack NDA examination but i dont know how to,as i'm in class 9 so please guide me.

or:i want to crack NDA examination but i dont know how to,as i'm in class 9 so please guide me.

or:The exam will tuckle what u have been taught just two weeks before,just read,study and cram them,reply them according to questions then u will pass!!

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