This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Immunology, Subject name: Microbiology
Most potent stimulator of naive T cells - 
Select and explain. 
A. Mature dendritic cells, B. Follicular dendritic cells, C. Macrophages, D. B cell
A: Mature dendritic cells
Answer: A: Mature dendritic cells 
Explanation: Dendritic cells (DCs) are antigen-presenting cells (also known as accessory cells) of the mammalian immune system. Their main function is to process antigen material and present it on the cell surface to the T cells of the immune system. They are called professional antigen presenting cells. Reff: Ananthanarayanan & Panikers textbook of microbiology 9th edition pg: 138