<prompt> An asthmatic patient is taken into the OT for removal of a tumor from colon. Which of the following anaesthetic agent is preferred in this patient?EtherKetamineTCEN20  <response>: Ventilatory drive is minimally affected by induction doses of ketamine, although rapid intravenous bolus administration or combinations of ketamine with opioids occasionally produce apnea. Racemic ketamine is a potent bronchodilator, making it a good induction agent for asthmatic patients. Ref: Butterwoh IV J.F., Mackey D.C., Wasnick J.D. 2013. Chapter 9. Intravenous Anesthetics. In J.F. Butterwoh IV, D.C. Mackey, J.D. Wasnick Eds, MorganMikhails Clinical Anesthesiology, 5e. 