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
Dithionite test is done for assessing - 
Select and explain. 
A. Hb F, B. Hb E, C. Hb A, D. Hb S
D: Hb S
Answer: D: Hb S 
Explanation: Ans. is `d' i.e., Hb S Dithionite test is a rapid screening tube test for the detection of HbS.