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: Pathology
Abtropfing affect is seen in 
Select and explain. 
A. Junctional nevus, B. Pennphigus, C. Apthous ulcer, D. Erythema multiformae
A: Junctional nevus
Answer: A: Junctional nevus 
Explanation: None