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
[{'content': 'Action of calmodulin isa) Ca2+ dependentb) Through calmodulin dependent kinasesc) Through cAMP dependent kinasesd) Through cGMP dependent kinases \nSelect and explain. \nA. ac, B. a, C. ad, D. ab', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Calcium and calmodulin forms a complex which activates myosin kinase that phosphorylates myosin head. Myosin kinase is a muscle phosphorylase.', 'role': 'assistant'}]