Which of the following conditions is usually associated with clubbing?

Question

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Clubbing in the nail bed is a sign associated with longstanding central cyanotic heart disease or pulmonary disease with hypoxemia.Peripheral cyanosis, a bluish discoloration of the nail bed, is seen more commonly.Peripheral cyanosis results from a reduction in the quantity of oxygen in the peripheral extremities from arterial disease or decreased cardiac output.Central cyanosis is a bluish discoloration of the tongue and sublingual area.Multiracial studies indicate that the tongue is the most sensitive site for observation of central cyanosis.

Which of the Following Conditions Is Usually Associated with Clubbing