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: Skin
A 50 years old man has a 2 year history of facial bullae & oral ulcers. Microscpic smear from skin lesions is most likely to disclose - 
Select and explain. 
A. Tzanck cells, B. Acantholytic cells, C. Necrosis, D. Koilogytosis
B: Acantholytic cells
Answer: B: Acantholytic cells 
Explanation: B. i.e. Acantholytic cell