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
The following morphologic changes is most consistent with allergic, rather than irritant, contact dermatitis 
Select and explain. 
A. Lymphocytic exocytosis, B. Papillary dermal edema, C. Eosinophilic infiltration, D. Spongiosis
C: Eosinophilic infiltration
Answer: C: Eosinophilic infiltration 
Explanation: Allergic form results from prior sensitization to specific allergens and  is accompanied by prominent eosinophilia, Spongiosis is common to  both allergic and non-allergic contact dermatitis.