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: Pathology
In sickle cell anaemia, there is 
Select and explain. 
A. 75 to 100% haemoglobin, B. 10 to 20% haemoglobin, C. 20 to 30% haemoglobin, D. 50 to 60% haemoglobin
A: 75 to 100% haemoglobin
Answer: A: 75 to 100% haemoglobin 
Explanation: None