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: Anaesthesia
Supraclavicular block is used for surgery of ? 
Select and explain. 
A. Shoulder, B. Neck, C. Arm, D. Forearm
C: Arm
Answer: C: Arm 
Explanation: Ans. is `c > a, d' i.e., Arm > Shoulder, Forearm