This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
All the following are cyanotic hea disease except 
Select and explain. 
A. TOF, B. PDA, C. Tricuspid atresia, D. Eisenmenger's complex
B: PDA
Answer: B: PDA 
Explanation: Ref Harrison 19 th ed pg 1523 Patent ductus aeriosus is not classified as a cyanotic congenital heayh disease. PDA is an acyanotic hea disease with left to right shunt.