The correct answer to the question is option 1: I, II and III. All three organizations, Bharat Electronics Limited, Garden Reach Shipbuilders and Engineers Limited, and Goa Shipyard Limited, are functioning under the Department of Defence Production and Supplies.

Bharat Electronics Limited (BEL) is a Government of India enterprise that specializes in the design, development, and manufacture of advanced electronic products for the defense sector. It is involved in the production of a wide range of defense electronics systems, including radars, sonars, communication systems, electronic warfare systems, and more.

Garden Reach Shipbuilders and Engineers Limited (GRSE) is a shipbuilding company under the Ministry of Defence. It is responsible for the construction and maintenance of warships for the Indian Navy and Coast Guard. GRSE has built various types of vessels, including frigates, corvettes, landing craft utility ships, and others.

Goa Shipyard Limited (GSL) is another shipbuilding company under the Ministry of Defence. It specializes in building and repairing ships for the Indian Navy, Coast Guard, and other commercial customers. GSL has manufactured a wide range of vessels, including patrol boats, offshore patrol vessels, fast attack craft, and others.

In conclusion, all three organizations mentioned