To solve this problem, we need to identify which cells in the stomach secrete gastric acid. Let's analyze the options:$\newline \bullet$Option 1: Gastrin secreting cells - Gastrin is a hormone that stimulates the secretion of gastric acid, but it is not the cell type that directly secretes the acid.$\newline \bullet$Option 2: Parietal cells - These cells are responsible for secreting hydrochloric acid (HCl) in the stomach, which is the main component of gastric acid.$\newline \bullet$Option 3: Peptic cells - Also known as chief cells, these cells secrete pepsinogen, not gastric acid.$\newline \bullet$Option 4: Acidic cells - This is not a specific cell type in the stomach.$\newline$Based on the analysis, the correct answer is Option 2: Parietal cells.