Final answer:
The patient hit both her right arm and head during the fall.
Step-by-step explanation:
Based on the given information, we can conclude that the patient hit both her right arm and head during the fall. The person is described as being prone with upper limbs touching the sides, which suggests that the right arm would have been in contact with the ground. Additionally, the information does not specify any other body part being hit apart from the head, so it can be inferred that the head was also affected. Therefore, the correct answer is d. Both right arm and head.