Final answer:
When a patient is uncomfortable with being touched, apologizing and avoiding further physical contact is the best course of action to respect their boundaries.
Step-by-step explanation:
If a patient seems uncomfortable with being touched on the arm in a caring manner, the most appropriate action to take is b) Apologize and avoid further physical contact. It's essential to respect a patient's boundaries and comfort levels. In health care settings, demonstrating respect for a patient's personal space is just as important as providing medical care. If touch is necessary for medical reasons, it should be communicated clearly, and consent should be obtained whenever possible.