<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:An investigator is studying the effect that mutations in different parts of the respiratory tract have on susceptibility to infection. A mutation in the gene encoding for the CD21 protein is induced in a sample of cells obtained from the nasopharyngeal epithelium. This mutation is most likely to prevent infection with which of the following viruses?? A: Rhinovirus, B: Epstein-Barr virus, C: Human immunodeficiency virus, D: Cytomegalovirus, E: Parvovirus,  <response>: This question is asking about the effect of a mutation in the CD21 protein on susceptibility to viral infection. CD21 is a complement receptor that binds Epstein-Barr virus and helps it infect B cells. A mutation in CD21 expressed on nasopharyngeal epithelial cells would likely prevent infection specifically by Epstein-Barr virus. Rhinovirus, HIV, CMV, and parvovirus do not utilize CD21 for cell entry.B: Epstein-Barr virus 