Task: Text Categorization
Input (English): Question: What is the mechanism of action of octreotide ?: 
 Options:  <0> Serotonergic receptor 5-HT4 agonist. <1> Motilin receptor agonist. <2> Somatostatin receptor agonist. <3> Antagonist of the motilin receptor. <4> Somatostatin receptor antagonist.
Output (English): pharmacology