This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T, Subject name: Physiology
[{'content': 'Pacemaker is formed by which of the following cells in GIT? \nSelect and explain. \nA. P- cells, B. Oxyntic cells, C. Cajal cells, D. Parietal cells', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Interstitial cells of Cajal are the Stellate Mesenchymal pacemaker cells Ref: Ganong 25th ed/page 496', 'role': 'assistant'}]