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: Anatomy
All of the following are the components of the white pulp of spleen, except - 
Select and explain. 
A. Periarteriolar lymphoid sheath, B. B cells, C. Antigen presenting cells, D. Vascular sinus
D: Vascular sinus
Answer: D: Vascular sinus 
Explanation: Vascular sinuses are a component of the red pulp of spleen and not the white pulp.