This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Muscle relaxants, Subject name: Anaesthesia
[{'content': 'Muscle relaxant contraindicated in Renal failure \nSelect and explain. \nA. Gallamine, B. d-TC, C. Vecuronium, D. Atracurium', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Gallamine is the muscle relaxant that entirely depends on renal excretion. and metocurine is also contraindicated in renal failure.', 'role': 'assistant'}]