This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Upper limb bones and muscles (proximal region) & Scapular movements, Subject name: Anatomy
After radical mastectomy there was injury to the long thoracic nerve. The integrity of the nerve can be tested at the bedside by asking the patient to:- 
Select and explain. 
A. Shrug the shoulders, B. Raise the arm above the head on the affected side, C. Touch the opposite shoulder, D. Lift a heavy object from the ground
B: Raise the arm above the head on the affected side
Answer: B: Raise the arm above the head on the affected side 
Explanation: Nerve Muscle Movement long thoracic nerve serratus anterior overhead abduction. spinal accessory nerve trapezius Shrugging of shoulder Lateral and medial pectoral nerves Pectoralis major touching the opposite shoulder.