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
While carrying a heavy suitcase the downward dislocation of glenohumeral joint is resisted by the following muscles EXCEPT 
Select and explain. 
A. Deltoid, B. Coracobrachialis, C. Sho head of biceps, D. Latissimus dorsi
D: Latissimus dorsi
Answer: D: Latissimus dorsi 
Explanation: The axis of pull of latissimus dorsi doesn't cross the shoulder joint and cannot have a shunt action on the joint. Shunt muscles - stabilise the corresponding joint, when not producing movement at the joint. For example, while carrying a heavy suitcase the downward dislocation of glenohumeral joint is resisted by the muscles like deltoid, coracobrachialis and sho head of biceps.