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
Which of following antigen cell does not express MHC Class II - molecules - 
Select and explain. 
A. Follicular cells thyroid, B. Microglia of brain, C. Langerhan's cells of skin, D. Dendritic cell of Lymphoid cells
A: Follicular cells thyroid
Answer: A: Follicular cells thyroid 
Explanation: Ans. is 'a' i.e., Follicular cells thyroid