Which is the incorrect pair ?

Question

Accepted Answer

The incorrect pair is Option 4: Port on call - Duisburg. Here's why:

*   **Why Option 4 is Incorrect:** A "port on call" refers to a port that a ship visits only when there is sufficient cargo or a specific need. Duisburg, while a significant inland port, is a major hub for container traffic and logistics due to its strategic location at the confluence of the Rhine and Ruhr rivers. It's a regular stop for many vessels, not just a port visited "on call." Duisburg's importance in European river transport means it has scheduled services and is not simply a port visited opportunistically.

*   **Why the other options are correct (and therefore not the answer):**

*   **Option 1: Inland Port - Memphis:** Memphis is a major inland port located on the Mississippi River. Its location makes it a crucial hub for barge traffic and the transportation of goods within the United States. This is a correct pairing.

*   **Option 2: Out Port - Piraeus:** Piraeus is the port of Athens, Greece, and serves as a major outport. An outport is a port located near a larger city, often serving as its primary maritime gateway. This is a correct pairing.

*   **Option 3: Entrepot Port - Copenhagen:** Copenhagen has historically been a significant entrepot port. An entrepot port is a port where goods are imported, stored, and then re-exported, often with some form of processing or repackaging. Copenhagen's strategic location in the Baltic Sea made it a key center for trade and distribution. This is a correct pairing.

Therefore, only Option 4 presents an incorrect pairing, making it the correct answer. Duisburg is not primarily a "port on call" but a major inland port with regular traffic.