Task: Text Categorization
Input (English): Question: Beta-adrenergic receptor blocking drugs: 
 Options:  <0> They cause hypotension in individuals with normal blood pressure. <1> They increase the atrio-ventricular conduction velocity. <2> They cause negative inotropism. <3> They provoke a positive chronotropic effect. <4> They increase the secretion of renin.
Output (English): pharmacology