Step 1: Understanding the Question.
In agency law, a Sub-agent is a person whom the agent appoints to carry out the agent's duties for the principal. The Sub-agent acts under the agent's authority but still represents the principal.
Step 2: Analysis of Options.
- (A) Sub-agent: This is the correct answer. A Sub-agent is appointed by the agent to carry out the principal's business.
- (B) Substituted Agent: This term refers to an agent appointed to replace the original agent, not a person named by the agent under implied authority.
- (C) Agent: The agent is the original person authorized to act for the principal, not the person named by the agent.
- (D) Procured Agent: This term is not commonly used in the context of agency law.
Step 3: Conclusion.
Thus, the correct answer is (A) Sub-agent.