This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Inhalational Anesthetic Agents, Subject name: Anaesthesia
The most - pungent inhalational agent- 
Select and explain. 
A. Halothane, B. Isoflurane, C. Enflurane, D. Desflurane
D: Desflurane
Answer: D: Desflurane 
Explanation: Desflurane is the most pungent of the volatile anesthetics, and it administered the face mask results in Coughing, salivation, breath holding and laryngospasm. Isoflurane and desflurane can provide equal bronchodilation but are not normally used for inhalation induction. Desflurane is not used because of its pungency which may result in a cough, laryngospasm, and bronchospasm.