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 trait, number of bands found in Hb- 
Select and explain. 
A. 2, B. 1, C. 4, D. 5
A: 2
Answer: A: 2 
Explanation: In hemoglobin electrophoresis, various types of hemoglobin move at varying speed.
In Sickle cell trait (heterozygous state), there are two types of hemoglobin : - HbS (40%) and HbA (60%). So, on electrophoresis, two different bands are produced.
In homozygous state, almost all hemoglobin is HbS. So, a single band is produced.

Laboratory findings of sickle cell anemia

Moderate to severe anemia.
Peripheral smear will show
Sickle cells
Target cells
Howell-Jolly bodies because of autosplenctomy.
A positive sickling test with a reducing substance like sodium metabisulfite.