Q. Consider the following statements:1. Tides are of great help in navigation and fishing.2. High tide enables big ships to enter or leave the harbour safely.3. Tide prevents siltation in the harbours.4. Kandla & Diamond Harbour are tidal ports. Which of these statements are correct ? 

1. 1 and 4
2. 2,3 and 4
3. 1,2 and 3
4. 1,2,3 and 4