Cause of central cyanosis include all of the following, Except
Chronic Asthma
Congenital Pulmonary stenosis
Congestive hea failure
Alveolar hypoventilation
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.