Treatment with alloxan destroys:

Which gland is both endocrine and exocrine in nature?

How many kinds of cells are found in the islets of Langerhans?

Which gland functions as both an exocrine and an endocrine gland?

Match different cells of Islets of Langerhans in Column-$I$ with their role in Column-$II$. Select the correct answer from the options given below.

Column-$I$	Column-$II$
$A$. Alpha cells	$I$. Stimulates muscles for glycogenesis.
$B$. Beta cells	$II$. Decreases gastric secretions and absorption in digestive tract.
$C$. Delta cells	$III$. Inhibits the release of pancreatic juice.
$D$. $F$ cells	$IV$. Stimulates liver for glycogenolysis.

Match the types of cells listed under column $I$ with the secretions given under column $II$. Choose the answer which gives the correct combination of the alphabets of the two columns.

Column $-I$ (Types of cells)	Column $-II$ (Secretions)
$(A)$ Beta cells	$(p)$ Lysozyme
$(B)$ Mast cells	$(q)$ Histamine
$(C)$ Paneth cells	$(p)$ Lysozyme
$(D)$ Acinar cells	$(s)$ Pancreatic enzymes