Where are the parotid salivary glands located?

Intrinsic factor that helps in the absorption of vitamin $B_{12}$ is secreted by

Match the following ducts in column $A$ with their respective organs or glands in column $B$:
$A$ (Duct) | $B$ (Organ/Gland)
$A.$ Stensen's duct | $1.$ Gall bladder
$B.$ Ducts of Rivinus | $2.$ Liver
$C.$ Duct of Wirsung | $3.$ Parotid gland
$D.$ Ductus choledochus | $4.$ Sublingual gland
$E.$ Wharton's duct | $5.$ Pancreas
$F.$ Cystic duct | $6.$ Common bile duct
$G.$ Hepatic duct | $7.$ Submaxillary gland
The correct matching sequence $(A, B, C, D, E, F, G)$ is:

What is the primary function of the liver in the human body?

The stool of a person contains a whitish-grey colour due to the malfunction of which organ?

Which cell is found in mucus-secreting organs?