This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Biochemistry
Carbohydrate of blood group substance is 
Select and explain. 
A. Sucrose, B. Fucose, C. Arabinose, D. Maltose
B: Fucose
Answer: B: Fucose 
Explanation: L-fucose is the carbohydrate poion of Blood group substances