This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General pathology, Subject name: Pathology
[{'content': 'CD marker of Cytotoxic T Cell Marker is? \nSelect and explain. \nA. CD4, B. CD8, C. CD21, D. CD45', 'role': 'user'}, {'content': 'Answer: B \nExplanation: ananthanarayanan textbook of microbiology 9th edition. *cytotoxic T cells with CD8 surface markers and MHC class 1 restriction can kill and lyse target cells carrying new or foreign antigen', 'role': 'assistant'}]