Hi aspirant,

Para cammandoes are the special task units of Indian military. You cannot directly be a para commando but you would have to serve the Indian army and following your performance, examination and discipline you would be promoted to this sector. Now to join military or Indian army after class 12th you need to write NDA examination and for which you need to have Mathematics as a compulsory subject. So even if you take Arts you can join the Indian armed forces provided that you have Mathematics as yourr subject. Now it is also important to know that you would not be considered for Indian Air force or Navy because they need physics as compulsory subject along with mathematics.

Hope it helps!