This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Glaucoma, Subject name: Ophthalmology
Topical drug that can cause Heterochromia Iridis 
Select and explain. 
A. Timolol, B. Olopatadine, C. Latanoprost, D. Brimonidine
C: Latanoprost
Answer: C: Latanoprost 
Explanation: Latanoprost, a PG analogue can cause heterochromia iridis in patients.