56.
The answer is: D
Explanation
Answer: D) Carter
Reason:
- Barter→ exchange of goods without money
- Purchase→ buying goods/services
- Sale→ selling goods/services
All three (A, B, C) relate to methods of trade and commerce.
- Carter→ a person who transports goods by cart; an occupation/profession, not a trade activity
The odd one out is Carter because it belongs to a different category entirely — a person, not a transaction.