This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anaesthesia, Subject name: Anaesthesia
The anaesthetic agent that causes maximum increase in intracranial pressure is 
Select and explain. 
A. Isoflurane, B. Halothane, C. Enflurane, D. Desflurane
B: Halothane
Answer: B: Halothane 
Explanation: By dilating cerebral vessels, halothane lowers cerebral vascular resistance and increases cerebral blood volume and CBF. Autoregulation, the maintenance of constant CBF during changes in aerial blood pressure, is blunted. Concomitant rises in intracranial pressure can be prevented by establishing hyperventilation before the administration of halothane. Cerebral activity is decreased, leading to electroencephalographic slowing and modest reductions in metabolic oxygen requirements. Ref: Miller's anesthesia 8th edition Ref: Morgan & Mikhail's clinical anesthesiology 6e