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
Ketamine is preferred anaesthetic agent in the following cases except 
Select and explain. 
A. Cyanotic congenital heart disease, B. Hypertension, C. Shock, D. Asthmatic patients
B: Hypertension
Answer: B: Hypertension 
Explanation: Since ketamine stimulates sympathetic nervous system, it causes hypertension and tachycardia.