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
Action of calmodulin isa) Ca2+ dependentb) Through calmodulin dependent kinasesc) Through cAMP dependent kinasesd) Through cGMP dependent kinases 
Select and explain. 
A. ac, B. a, C. ad, D. ab
D: ab
Answer: D: ab 
Explanation: Calcium and calmodulin forms a complex which activates myosin kinase that phosphorylates myosin head. Myosin kinase is a muscle phosphorylase.