This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Regional anaesthesia, Subject name: Anaesthesia
In high spinal anaesthesia what is seen - 
Select and explain. 
A. Hypotension & Bradycardia, B. Hypotension & Tachycardia, C. Hypeension & Bradycardia, D. Hypeension & Tachycardia
A: Hypotension & Bradycardia
Answer: A: Hypotension & Bradycardia 
Explanation: High spinal anaesthesia involving T4 thoracic segment blocks sympathetic autonomic fibres for hea resulting in vagal dominance. Hence, hypotension and bradycardia occur.