Task: Text Categorization
Input (English): Question: The MIC-A protein, expressed in various cell types and induced by cellular stress situations, is recognized by: 
 Options:  <0> KIR receivers. <1> The Major Histocompatibility Complex (MHC). <2> The NKG2D receptor. <3> B lymphocytes <4> NOD type receivers.
Output (English): pharmacology