- Pilot, Driver, Gardener: Examples of tertiary sector jobs (service-based).
- Fisherman, Teacher, Lawyer: Represent varied economic sectors, primarily service-oriented.
- Doctor, Teacher, Lawyer: All are part of the tertiary sector (service industry).
- Engineer, Professor, Farmer: The farmer is in the primary sector (agriculture), making this group inconsistent.
Conclusion: The outlier is \( \mathbf{(C)} \) because the farmer works in the primary sector, whereas the others are in different sectors.