The correct option is A 1,3 and 4
The National Defence Academy at Khadakvasla, at the outskirts of Pune, is the alma mater of the officers of the defence forces. Here Officer Cadets undergo training for three years before they are allocated to the defence arms for further training. The National Defence Academy has the proud privilege of training more than 700 cadets from around 28 friendly countries viz. Afghanistan, Bhutan, Ghana, Nepal etc.