Step 1: Locate the dam on the Mahanadi.
That is Hirakud Dam near Sambalpur in Odisha, one of the longest earthen dams in the world, used for irrigation, power and flood control.
Step 2: Locate the nuclear plant in Uttar Pradesh.
That is the Narora Nuclear Power Plant in Bulandshahr district, run by NPCIL on the banks of the Ganga.
Step 3: Locate the software park and the port.
Maharashtra's major software technology park is at Pune, a leading IT hub, while Gujarat's major sea port is Kandla, also called Deendayal Port, in the Gulf of Kachchh.
Any three of these four, Hirakud Dam, Narora, Pune and Kandla, should be marked and labelled correctly on the map.