Of the four places marked 1, 2, 3 and 4 on the map, the one indicating a tidal port is

1. The question asks to identify a tidal port among the four locations marked on the provided map. 2. A tidal port is a port where the water level is significantly affected by tides, often requiring ships to enter or leave only at high tide, or necessitating the construction of lock gates or deep basins. 3. Without the actual map, we must infer based on likely locations marked in UPSC questions. Major tidal ports in India include Kandla (Gujarat) and Diamond Harbour/Haldia (West Bengal). 4. Assuming the markings represent major ports on the Indian coastline: - Location 1 might be a west coast port like Mumbai or Mormugao. - Location 2 might be a southern port like Cochin or Chennai. - Location 3 is plausibly positioned near the Gulf of Kutch, representing Kandla Port, which is a well-known major tidal port. - Location 4 might be an east coast port like Visakhapatnam or Paradip. 5. Given Kandla's prominence as a tidal port, location 3 is the most likely answer.