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: Pharmacology
A direct-acting cholinomimetic that is lipid soluble and has been used in the treatment of glaucoma is: 
Select and explain. 
A. Acetylcholine, B. Physostigmine, C. Pilocarpine, D. Neostigmine
C: Pilocarpine
Answer: C: Pilocarpine 
Explanation: Directly acting- Pilocarpine
Indirectly acting- Physostigmine