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
NOT a Spiral muscle among the following is 
Select and explain. 
A. Sternocleidomastoid, B. Supinator, C. Pectoralis major, D. Trapezius
A: Sternocleidomastoid
Answer: A: Sternocleidomastoid 
Explanation: Spiral muscle are

Supinator
Pectoralis major
Trapezius
Latissimus dorsi