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: Pathology
[{'content': 'Which one of the following acts to increase the release of Ca" from endoplasmic reticulum? \nSelect and explain. \nA. Inositol triphosphate, B. Parathyroid hormone, C. 1, 25-dihydroxy cholecalciferol, D. Diacylglycerol', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. is \'a\' i.e., Inositol triphosphateo Inositol triphosphate (IP3) mobilises ca + from endoplasmic reticulum.o Diacylglycerol (DAG) enhances activation of protein kinase C by ca".', 'role': 'assistant'}]