Final answer:
Nurses are primarily responsible for order entry management functions in the Electronic Health Record (EHR) system.
The correct option is: b) Nurses.
Step-by-step explanation:
In the Electronic Health Record (EHR) system, the group primarily responsible for order entry management functions is b) Nurses. Nurses are typically responsible for inputting and managing orders in the EHR system, ensuring that the orders are accurately recorded and carried out.