Which of the following conditions is commonly associated with tetralogy of Fallot?

A. While heart failure can occur in many congenital heart defects, it is not the most specific condition commonly associated with tetralogy of Fallot. B. Asthma is not typically associated with tetralogy of Fallot. It is a respiratory condition that does not have a direct link to congenital heart defects. C. Tetralogy of Fallot is associated with polycythemia due to chronic hypoxemia. The body produces more red blood cells in response to low oxygen levels, leading to an increased hematocrit. D. While pulmonary hypertension can occur in congenital heart defects, tetralogy of Fallot is more directly associated with polycythemia as a result of the decreased blood flow to the lungs.