The correct option is B Parietal cells
Gastric juice, thin, strongly acidic almost colorless liquid secreted by the glands in the lining of the stomach. Its essential constituents are the digestive enzymes pepsin and rennin, hydrochloric acid, and mucus. Parietal cells (also known as oxyntic cells) are the epithelial cells that secrete the gastric juice. These cells are located in the gastric glands found in the lining of the fundus and in the body of the stomach.