Q:
      
      
         
            
AIDS is caused by the Human Immunodeficiency Virus (HIV). The transmission of HIV infection generally occurs through
         
       
      
      
      
          
      
      
          Answer & Explanation
         Answer: B) transfusion of contaminated blood and blood products         
         
Explanation: AIDS is caused by the Human Immuno deficiency Virus (HIV), a member of a group of viruses called retrovirus, which have an envelope enclosing the RNA genome. Transmission of HIV-infection generally occurs by (a) sexual contact with infected person, (b) by transfusion of contaminated blood and blood products, (c) by sharing infected needles as in the case of intravenous drug abusers and (d) from infected mother to her child through placenta.
       
      
      
      
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