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': 'Low calcium level will cause: \nSelect and explain. \nA. Hyper excitability of wrist muscle, B. Weak heart action, C. Tetany, D. All of the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]