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
Ptosis is due to damage of : 
Select and explain. 
A. Occulomotor nerve, B. Abducens nerve, C. Trochlear nerve, D. Facial nerve
A: Occulomotor nerve
Answer: A: Occulomotor nerve 
Explanation: None