This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Airway, Subject name: Anaesthesia
The proseal LMA has advantage over normal LMA 
Select and explain. 
A. In being more easy to inse, B. Comparable to endotracheal tube in preventing aspiration, C. Can be inseed in concious patient., D. Can be used for pulmonary toileting
B: Comparable to endotracheal tube in preventing aspiration
Answer: B: Comparable to endotracheal tube in preventing aspiration 
Explanation: Advantage of proseal LMA over classical LMA is that it is comparable to ETT in preventing aspiration. The PLMA shows several modifications from the cLMA: The drain tube runs through the device from the tip to the proximal end. When the PLMA is correctly positioned, the tip of the device forms a high-pressure seal with the oesophageal inlet and the drain tube runs in continuity with the oesophageal lumen . oesophageal drain tube posterior inflatable cuff reinforced airway tube integral bite block introducer this reduces the risk of aspiration and hence may be suitable in non-supine positions (e.g., lateral, prone), in laparoscopic surgery (e.g., cholecystectomy, gynecological surgery), and in patients who are obese.