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': 'Cause of central cyanosis include all of the following, Except \nSelect and explain. \nA. Chronic Asthma, B. Congenital Pulmonary stenosis, C. Congestive hea failure, D. Alveolar hypoventilation', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Answer is C (Congestive hea failure): Congestive Hea Failure is a cause for Peripheral cyanosis and not central cyanosis Cyanosis when present in Asthma, pulmonic stenosis and alveolar hypoventilation is of the central type.', 'role': 'assistant'}]