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
Maximum histamine is released by 
Select and explain. 
A. d Tubocurarine, B. Succinycholine, C. Pancronium, D. Gallamine
A: d Tubocurarine
Answer: A: d Tubocurarine 
Explanation: Tubocurarine is a toxic alkaloid historically known for its use as an arrow poison.
In the mid-1900s, it was used in conjunction with an anesthetic to provide skeletal muscle relaxation during surgery or mechanical ventilation.