Correct Option (D)
Statements I, II, III, and IV are all correct.
- Statement I: Tides significantly aid navigation and fishing. High tides allow ships to access shallow ports, while tidal currents can assist in fishing by concentrating marine life.
- Statement II: High tides raise the water level, providing sufficient depth for large vessels to enter or depart harbors without grounding.
- Statement III: The ebb and flow of tidal currents help to scour harbor channels, preventing the accumulation of silt and maintaining navigable depths.
- Statement IV: Kandla Port in Gujarat and Diamond Harbour in West Bengal are notable examples of tidal ports in India, where port operations are heavily influenced by tidal cycles.
Incorrect Options:
Options A, B, and C are incorrect because they exclude one or more correct statements.
- Option A (I and IV): This option is incomplete as statements II and III are also correct.
- Option B (II, III and IV): This option is incomplete as statement I is also correct.
- Option C (I, II and III): This option is incomplete as statement IV is also correct.