This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T, Subject name: Pathology
In adults, most common autoimmune disease of liver is? 
Select and explain. 
A. Autoimmune hepatitis, B. Sclerosing cholangitis, C. alpha antitrypsin deficiency, D. Primary billiary cirrhosis
D: Primary billiary cirrhosis
Answer: D: Primary billiary cirrhosis 
Explanation: it is a progressive chronic autoimmune desease usually affect middle aged women with peak incidence between 40 to60 yrs of age SYSTEMIC AND GENERAL PATHOLOGY RAMDAS NAYAK PGNO.461