Which one of the following pairs of the kind of cells and their...

Oxyntic (or parietal) cell is present in the wall of the stomach that produce $\mathrm{HCl}$ which forms the part of gastric juice. Oxyntic cell also produce intrinsic factor which is involved in the absorption of vitamin $\mathrm{B}_{12}$ in the small intestine. The $\mathrm{pH}$ of gastric acid is 2-3 in the stomach of the lumen. The acidity being maintained by the proton pump, $\mathrm{a} \mathrm{H}^{+} /$ $\mathrm{K}^{+}$ATPase. Alpha cell of islets of langerhans secrete glucagon hormone which raises blood glucose level by stimulating liver to convert glycogen to glucose and by stimulating the conservation of fatty acids and amino acids to glucose. Kupffer cells are specialized macrophages that disposes of old blood cells and particulate matter. Kupffer cells, named after Karl Wilhem Von Kupffer, are found in the bloodstreams and in the liver, attached to the walls of the sinusoids. Sebaceous gland is a simple or branched glands in the skin that secrete an oily substance, sebum which is fatty mildly antiseptic material that protects, lubricates, and waterproofs the skin and hair and help prevent dessication.