 
			 
			MCQOPTIONS
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				| 1. | Combined cellular and humoral immune deficiencies result from lack of all of the following except | 
| A. | a thymus | 
| B. | class II MHC | 
| C. | HIV infection of CD4+ T cells | 
| D. | transporter of antigen peptides (TAP) | 
| Answer» E. | |