<prompt> Commonest cause of female pseudo hermaphroditism is:Virlizing ovarian tumorOvarian dysgenesisExogenous androgenCongenital adrenal hyperplasia  <response>: The most common cause of female pseudohermaphroditism is congenital virilizing adrenal hyperplasia CVAH or CAH. Ref: Harrisons Principles of Internal Medicine, 14th Edition, Page 2124 and 15th Edition, Page 2178 ; Textbook of Gynecology By D C Dutta, 4th Edition, Page 42 ; Transgenderism and Intersexuality in Childhood and Adolescence: Making Choices By Peggy Tine Cohen-Kettenis, Friedemann Pfafflin, 2003, Page 40 