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
Muscles forming boundaries of carotid triangle are all except 
Select and explain. 
A. Posterior belly of digastric, B. Superior belly of omohyoid, C. Inferior belly of omohyoid, D. Sternocleidomastoid
C: Inferior belly of omohyoid
Answer: C: Inferior belly of omohyoid 
Explanation: Boundaries of carotid triangle are :

Anterosuperiorly – posterior belly of digastric.
Anteroinferiorly – superior belly of omohyoid.
Posteriorly – sternocleidomastoid muscle.