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: Gynaecology & Obstetrics
Alkali resistant haemoglobin is : 
Select and explain. 
A. HbA, B. HbA, C, C. HbS, D. HbF
D: HbF
Answer: D: HbF 
Explanation: HbF