Task: Text Categorization
Input (English): Question: The T lymphocyte receptor (TCR): 
 Options:  <0> Experience change of class. <1> Does not experience affinity maturation. <2> It transmits signals to the T lymphocyte on its own. <3> It has two sites of antigen recognition such as antibodies. <4> Performs effector functions mediated by its constant regions.
Output (English): biology