This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Gallstone Disease, Subject name: Surgery
In Hemolytic anemia which stones are commonly seen : 
Select and explain. 
A. Pigment stone, B. Cholesterol stone, C. Mixed stone, D. All of above
A: Pigment stone
Answer: A: Pigment stone 
Explanation: Ans. (a) Pigment stonesRef: Bailey & Love 26th ed. /1106-1107In hemolytic anemia like hereditary spherocytosis, on account of increased extravascular hemolysis, there is production of calcium bilirubinate stones (pigment stones).