This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Neuromuscular Blocker, Subject name: Anaesthesia
[{'content': 'Which of the following occurs first with the use of d-tubocurare: \nSelect and explain. \nA. Diaphragmatic relaxation, B. Abdominal wall relaxation, C. Diplopia, D. Ptosis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Any neuromuscular blocker when given intravenously goes to highly perfused organ like diaphragm and intercostal muscle first then facial muscle , then upper limb and last lower limb. Thus sequence of block - diaphragm and intercostal muscle - facial muscle - upper limb - lower limb', 'role': 'assistant'}]