The hepatocytes originate from which embryonic layer?

Given below are two statements regarding gastric glands.
$Statement-I$: Oxyntic cells secrete pepsinogen.
$Statement-II$: Chief cells secrete $HCl$.
In light of the above statements,choose the appropriate answer from the options given below.

All of the following juices contain enzymes,except:

If the pancreas is removed,the compound which remains undigested is

Ptyalin is secreted by .......

Mumps is a viral disease caused by the inflammation of which of the following?