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: Medicine
[{'content': 'Virilisation of the female is present in all, EXCEPT \nSelect and explain. \nA. 17-α  hydroxylase deficiency, B. 21-α  hydroxylase deficiency, C. 11-α  hydroxylase deficiency, D. 11-α  hydroxysteroid deficiency', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Congenital adrenal hyperplasia -\nIs commonly caused by following 3 enzyme deficiencies \n\n21 α hydroxylase deficiency (complete)\n21 α hydroxylase deficiency (partial)\n11 α Hydroxylase deficiency\n17 α hydroxylase deficiency\n\n17 α hydroxylase deficiency\n\nHypertension\nNo virilization in females (because the gene that codes for 17 α also codes for the enzyme in adrenal cortex).\nPrimary amenorrhoea and failure of development of secondary sexual characteristic in females.\nMale pseudohermaphrodites\n\n21 α hydroxylase deficiency Complete (Salt losing virilizing syndrome) \n\nHypotension\nVirilization (& Precocious puberty in males)\n\n21α hydroxylase deficiency Partial (Simple virilizing)\n\nNormal B.P.\nVirilization (& Precocious puberty in males)\n\n11 β hydroxylase deficiency\n\nHypertension\nVirilization (& Precicous puberty in males)', 'role': 'assistant'}]