Explanation:

Garden Reach Shipbuilders & Engineers Ltd, abbreviated as GRSE, is one of India's leading shipyards, located in Kolkata, West Bengal. It builds and repairs commercial and naval vessels.

Bharat Dynamics Limited is one of India's manufacturers of ammunitions and missile systems. It was founded in 1970 in Hyderabad, Telangana. BDL was established in the year 1970 to be a manufacturing base for guided weapon systems.

Mishra Dhatu Nigam Limited, abbreviated as MIDHANI, is a specialized metals and metal alloys manufacturing facility in India, located in Hyderabad, Telangana. It is a Public Sector Undertaking, under the administrative control of Department of Defence Production, Ministry of Defence, Government of India.