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
The suboccipital triangle is bounded superolaterally by: 
Select and explain. 
A. Rectus capitis posterior major muscle, B. Rectus capitis posterior minor muscle, C. Superior oblique muscle, D. Inferior oblique muscle
C: Superior oblique muscle
Answer: C: Superior oblique muscle 
Explanation: Ref: BDC -194
Boundaries
Superomedially: Rectus capitis posterior major muscle supplemented by the rectus
capitis posterior minor.

Superolaterally: Superior oblique muscle.

Inferiorly: Inferior oblique muscle.

Roof
Medially: Dense fibrous tissue covered by the semispinalis capitis.
Laterally: Longissimus capitis and occasionally the splenius capitis.

Floor
1. Posterior arch of atlas.
2. Posterior atlanto-occipital membrane

Contents
1. Third part of vertebral artery.
2. Dorsal ramus of nerve C1 – suboccipital nerve.
3. Suboccipital plexus of veins.