SCID is
a. always caused by Adenosine deaminase deficiency and results in no B or T cell response
b. always caused by reticular dysgenesis and results in no B or T cell response
c. a term used to describe a variety of different conditions that results in no B or T cell response
d. caused by a missing piece (a small deletion) of chromosome 22 that results in no B or T cell response
C
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