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
Autoimmunity can be caused due to all of the all following except - 
Select and explain. 
A. The pressure of forbidden clones, B. Expression of cryptic antigens, C. Negative selection of T-cells in the thymus, D. Inappropriate expression of the MHC proteins
C: Negative selection of T-cells in the thymus
Answer: C: Negative selection of T-cells in the thymus 
Explanation: Altered T or B cell function also contribute to autoimmunity. Enhanced helper T cell and decreased suppressor T cell functions have been suggested as cause of immunity. - defect in the tymus, in stem cell development and macrophage function have also been postulated as causes. Reference: Anathanarayan & paniker's 9th edition, pg no: 179 <\p>