Concept:
Sources of recruitment are classified into internal and external sources.
Step 1: Understanding transfer.
Transfer involves shifting an employee from one job position to another within the same organization.
Step 2: Type of recruitment.
Since the employee already exists within the organization, it is considered an internal source of recruitment.
Step 3: Evaluate options.
- External $\rightarrow$ From outside organization (incorrect)
- Outsourcing $\rightarrow$ Hiring outside agencies (incorrect)
- Internal $\rightarrow$ Within organization (correct)
- None $\rightarrow$ Incorrect
Step 4: Conclusion.
Thus, transfer is an internal source of recruitment.