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: Anaesthesia
[{'content': 'Competitive neuromuscular blockade is enhanced by all except \nSelect and explain. \nA. Hypercalcemia, B. Hypermagnesemia, C. Acidosis, D. Aminoglycosides', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Hypocalcemia enhances neuromuscular blockade of competitive neuromuscular blockers.', 'role': 'assistant'}]