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
Which of the following is not a voluntary extraocular muscle 
Select and explain. 
A. Superior rectus, B. Superior oblique, C. Superior tarsal muscle, D. Levator palpebrae superioris
C: Superior tarsal muscle
Answer: C: Superior tarsal muscle 
Explanation: Voluntary Muscles:
1. Four Recti ⇒
→ Superior rectus.
→ Inferior rectus.
→ Medial rectus.
→ Lateral rectus.
2. Two obliques ⇒
→ Superior oblique.
→ Inferior oblique.
3. Levator palpebrae superioris ⇒ Elevates the upper eyelid.
Involuntary Muscles:
1. Superior tarsal muscle  ⇒ Elevates upper eyelid.
2. Inferior tarsal muscle  ⇒ Depresses lower eyelid.
3. Orbitalis muscle.