This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: JIPMER 2019, Subject name: Anaesthesia
The patient with least risk of pulmonary aspiration of gastric contents during induction of anesthesia is:- 
Select and explain. 
A. Markedly obese and NPO for eight hours, B. Fed coffee four hours before elective surgery, C. Scheduled for elective cesarean delivery and NPO for 20 hours, D. NPO for four hours after a full meal
A: Markedly obese and NPO for eight hours
Answer: A: Markedly obese and NPO for eight hours 
Explanation: NPO is same for obese and normal. NPO guidelines - 6hrs for liquid and semisolid, 2 hours NPO for clear fluids. Subset of patients who are at high risk for aspiration - pregnant women, morbidly obese (rapid sequence induction), full fatty meal - 8 hours NPO.