Explanation: In the context of West Bengal's geography and port systems, a subsidiary port is a smaller port that supports the operations of a major port. The concept of subsidiary ports is crucial in understanding the logistics and management of cargo traffic in a region.
Kolkata, being one of the major ports in India, has a significant role in the country's maritime trade. However, due to the increasing volume of cargo traffic, the main port of Kolkata can become congested. To address this issue, subsidiary ports are established to help manage the cargo traffic and reduce congestion at the main port.
Haldia, located on the Haldia dock system, is a subsidiary port of Kolkata. It is situated on the Haldia dock system, which is an extension of the Kolkata port complex. The Haldia dock system was established to handle the increasing cargo traffic and to provide additional facilities for the maritime trade. By serving as a subsidiary port, Haldia helps in managing the cargo traffic and reducing congestion at the main Kolkata port.
The other options provided in the question are not relevant to the context of subsidiary ports of Kolkata. Tuticorin is a major port located in Tamil Nadu, Jawaharlal Nehru is a name associated with the former Prime Minister of India, and Visakhapatnam is a major port located in Andhra Pradesh. These options might seem plausible to a student who is not familiar with the geographical distribution of ports in India or the specific role of subsidiary ports in the port system.
In conclusion, Haldia is the correct answer as it is a subsidiary port of Kolkata, playing a crucial role in managing the cargo traffic and reducing congestion at the main port. Understanding the concept of subsidiary ports and their role in the port system is essential for comprehending the logistics and management of maritime trade in a region.