Final answer:
Tertiary care services are provided by medical specialists or hospital staff to a patient whose primary care was provided by a general practitioner. These services are specialized and often require advanced medical knowledge and expertise.
Step-by-step explanation:
The correct answer is A) Tertiary care services. Tertiary care services are provided by medical specialists or hospital staff to a patient whose primary care was provided by a general practitioner. These services are specialized and often require advanced medical knowledge and expertise. Examples of tertiary care services include specialized surgeries, intensive care, and cancer treatment.