Which of the following services falls under specialized goods and services for competitive contracting?

The correct choice is medical services, which fall under specialized goods and services for competitive contracting due to their unique nature and the specific expertise required to provide them. In the context of competitive contracting, medical services often involve specialized skills, certifications, and compliance with various regulations and standards that are distinct from more generalized goods and services.

These services typically require a high level of professionalism and prequalifications, making them more suited for competitive bidding processes that focus on quality and qualifications rather than just cost. This is important because medical services can have significant implications for health and safety, necessitating rigorous evaluation and standards for the providers involved.

The other options, while they may involve specific skill sets, do not fit as seamlessly into the category of specialized services requiring the same level of regulation and certification that medical services do.