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
Which of the following occurs first with the use of d-tubocurare: 
Select and explain. 
A. Diaphragmatic relaxation, B. Abdominal wall relaxation, C. Diplopia, D. Ptosis
A: Diaphragmatic relaxation
Answer: A: Diaphragmatic relaxation 
Explanation: 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