Which of the following glands functions as both an endocrine and an exocrine gland?

The function of the $Glucagon$ hormone is:

Which gland is both exocrine and endocrine?

Select the correct option for the following statements:
$(i)$ The pancreas is a $heterocrine$ / $endocrine$ gland.
$(ii)$ $Muscular$ $tissue$ / $Neural$ $tissue$ is a composite tissue.

Assertion $(A):$ Insulin is a hypoglycemic hormone.
Reason $(R):$ Insulin increases the cellular uptake and utilisation of glucose.

What increases in the body upon the injection of $Insulin$?