This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Physiology
The intrinsic factor of the castle is secreted by which of the following cells in gastric glands 
Select and explain. 
A. Chief cells, B. Parietal cells, C. Enterochromaffin cells, D. B cells
B: Parietal cells
Answer: B: Parietal cells 
Explanation: Secretions of stomach
-        HCl- Parietal cells/ Oxyntic cells
-        The intrinsic factor of Castle- Parietal cells/ Oxyntic cells
-        Pepsinogen- Chief cells/ Peptic cells
-        Gastrin- G cells
-        Somatostatin- D cells
-        Histamine- ECL cells