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: Ophthalmology
Which of the following iris lesions is a true tumor 
Select and explain. 
A. Lisch nodule, B. Koeppe nodule, C. Kundmann - walffian body, D. None of the above
A: Lisch nodule
Answer: A: Lisch nodule 
Explanation: Kunkmann - wolffian body - normal iris stroma
Koeppe nodule - inflammatory cells.
Lisch nodule - Iris hamartoma associate with neurofibromatosis.