DRDO never take any registration fess and how it possible that any private company invest 1000 cr to buy Rp.tell me accurate process .who is going to buy in legal tender with full prove .

DRDO never buy any article . It only gives
Authorization to buyer company and take thousand
Of Crores as Registration fee

DRDO and buying company relationship is only chemical supply.
According to company DRDO is chemical store.
Registration fee is less.but getting registration difficult.
Only 4 company have registration in India.