Which of the following ports is confronted with the problem of silt accumulation?

The correct option is Kolkata port.

Kolkata port is a premier riverine port located on the banks of the Hooghly River in West Bengal, India. Unlike coastal ports that open directly into the sea, riverine ports are situated inland along rivers, making them highly susceptible to sediment deposition.

The Hooghly River carries a massive volume of silt and sediment downstream from its upstream flow. As the river approach near the sea slows down, it deposits this silt along the riverbed. This continuous accumulation of sediment reduces the depth of the shipping channel, posing a major navigation hazard for large vessels.

To keep the shipping channel navigable, the port authority must undertake constant and expensive dredging operations to scoop out the accumulated silt and maintain a safe depth (draft) for incoming ships.