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: Anatomy
Rupture of supraspinatus manifests as - 
Select and explain. 
A. Painful movements, B. Flat shoulders, C. Difficulty in initiation of abduction, D. Difficulty in abduction after 90°
C: Difficulty in initiation of abduction
Answer: C: Difficulty in initiation of abduction 
Explanation: Supraspinatus is responsible for shoulder abduction for the first 15 degrees. If it is torn completely, the initiation of abduction is impossible. Passive abduction upto 15 degrees allows other muscles to take over for further abduction.