Q:
      
      
         
            
Select the correct statement about immune system?
         
       
      
      
      
          
      
      
          Answer & Explanation
         Answer: A) The causative agent in acquired immune deficiency syndrome (AIDS) is a virus that recognizes CD4 proteins         
         
Explanation: Among the given options, the correct statement about immunodeficiency is "The causative agent in acquired immune deficiency syndrome (AIDS) is a virus that recognizes CD4 proteins".
       
      
      
      
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