Concept:The North Atlantic sea route connects seaports in West Africa, such as Lagos, with seaports in Europe.
Explanation:The route used for trade between Nigeria and Europe is the North Atlantic sea route.
The seaports on this route include Lagos-Antwerp, Lagos-Rotterdam, Lagos-Southampton and Lagos-Hamburg.
Lagos-Montreal is not on the North Atlantic route because Montreal is in Canada, which is in North America.
The route between Nigeria and America is the South Atlantic sea route.
Therefore, Lagos-Montreal is the seaport that is not used on the North Atlantic sea route.
Answer:B. Lagos-Montreal