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
Alopecia aerate is presumed to be: 
Select and explain. 
A. Androgenic in nature, B. Autoimmune in etiology, C. Infective in etiology, D. Pa of lichenoid in spectrum
B: Autoimmune in etiology
Answer: B: Autoimmune in etiology 
Explanation: B. i.e. Autoimmune in etiology