What is hypercapnic respiratory failure?

A. A condition in which there is excessive carbon dioxide in the bloodstream leading to unconsciousness: Hypercapnia may lead to unconsciousness eventually, but this option is too specific and not the definition of hypercapnic respiratory failure. B. A condition in which there is inadequate oxygen availability to the tissues: This describes hypoxic respiratory failure, not hypercapnic. C. A condition in which there is insufficient removal of carbon dioxide from the body: This is the correct definition of hypercapnic respiratory failure (Type 2), often seen in COPD or neuromuscular diseases. D. A condition in which there is low arterial oxygen tension (PaO2): This defines hypoxemic respiratory failure, not hypercapnic.