Which of the following is a specific type of real estate license in the Commonwealth of Pennsylvania?

A property consultant is a title often used to describe professionals who provide advice on real estate investments or property management. However, this term does not refer to a specific type of real estate license in Pennsylvania, making it an incorrect choice.

While commercial leasing experts focus on leasing commercial properties and may have specialized knowledge in that area, there is no specific license designated as a "commercial leasing expert" in Pennsylvania. This designation does not fulfill the requirement of being a recognized type of real estate license.

A transaction advisor refers to a professional who assists clients throughout the real estate transaction process, typically including negotiations and paperwork. However, similar to the previous options, this is not a recognized or specific type of real estate license in Pennsylvania, rendering it an incorrect answer.