Concept:Industrial zones are geographical areas where manufacturing industries are concentrated.
Explanation:In Nigeria, the major industrial zones are grouped around the western, south-east, and north-central areas.
These zones contain large industrial towns, transport links, raw materials, and power supply.
The south/south region is a recognised geopolitical zone, but it is not classified as one of Nigeria's major industrial zones.
Therefore, it is the exception among the options given.
Answer:D. the south/south industrial zone