This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Surgery
Which of the following movements will be affected if the greater tubercle of the humerus is lost: 
Select and explain. 
A. Abduction and lateral rotation, B. Adduction and flexion, C. Adduction and medial rotation, D. Flexion and medial rotation
A: Abduction and lateral rotation
Answer: A: Abduction and lateral rotation 
Explanation: A i.e. Abduction & lateral rotation The movement most commonly affected in greater tuberosity fracture is external rotation in abductionQ This is very obvious because the muscles inseed in greater tuberosity of humerus & their actions are as following.