Hey!

i would say ECE.

though the eligibility is any bachelors for cds, i would say read engineering. because an engineer can perform technically well on a battle field. so coming to branches of engineering, you can actually take up any engineering. but the cadets in NDA are compelled to study ece engineering (for airforce and navy).

so when they themselves do that, why shouldnt we take that as an example. so study ece is what i would say.

i hope it helps you