Task: Question Answering
Input (English): Question: Indicate the correct answer regarding the pancreas: 
 Options:  <1> Your alpha cells secrete insulin. <2> Its F cells produce somatostatin, which accelerates the secretion of glucagon. <3> Your alpha cells secrete glucagon, which increases the concentration of blood glucose. <4> It is an exclusively endocrine gland. <5> Its delta cells secrete pancreatic polypeptide.
Output (English): 3