This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Medicine
Cyanosis of Lip is present in: 
Select and explain. 
A. Polycythemia, B. MI, C. Angina, D. All of the above
A: Polycythemia
Answer: A: Polycythemia 
Explanation: None