This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Misc. (W.B.C), Subject name: Pathology
[{'content': 'Host receptor for streptococcus pyogenes is? \nSelect and explain. \nA. CD4, B. CD21, C. CD44, D. CD46', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. (d) CD46(Ref: Wintrobes I2th/pg 2523)CD46 (Complement Membrane Cofactor Protein): It is a receptor to a number of pathogens, such as herpes virus 6, M protein of group A streptococci, Neisseria gonorrhoeae, and Escherichia coli.', 'role': 'assistant'}]