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': 'True for smooth muscle contraction is all excepta) More Latching when lower cross-bridge formation.b) Dephosphorylation causes definite relaxationc) LC phosphatase is essential for binding d) Slow & prolonged contractile response independent of nerve supplye) Length tension relationship does not exist \nSelect and explain. \nA. a, B. c, C. ac, D. bc', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Dephosphorylation in smooth muscle does not guarantee relaxation, as some myosin will remain latched to actin.\nLight chain phosphatase helps in dephosphorylation, not binding.', 'role': 'assistant'}]