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: Dental
Hailey – hailey disease is also called as – 
Select and explain. 
A. Benign familial chronic pemphigus, B. Pemphigus acutus, C. Pemphigus, D. Lyell's syndrome
A: Benign familial chronic pemphigus
Answer: A: Benign familial chronic pemphigus 
Explanation: Hailey-Hailey disease is also referred to as Benign familial pemphigus.