A positive drop arm test indicates:

Correct option is D

A positive drop arm test indicates a rotator cuff injury, specifically a tear in the rotator cuff muscles. In this test, the patient is asked to raise their arm and then lower it slowly. If the arm suddenly drops or cannot be controlled while lowering, it suggests a rotator cuff tear.
Explanation of options: (a) ✘ Incorrect. Potts fracture is a type of fracture involving the lower leg, not related to the drop arm test. (b) ✘ Incorrect. Golfer’s elbow is a condition involving pain and inflammation of the tendons in the elbow, not assessed by the drop arm test. (c) ✘ Incorrect. Colles’s fracture involves a break in the distal radius in the wrist, unrelated to the drop arm test. (d) ✔ Correct. Rotator cuff injury is correctly indicated by a positive drop arm test, which assesses shoulder muscle function.