This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pediatrics
Video based question - AIIMS NICU - neonate shown on O2 with nasal prongs, not intubated, sister shown inseing a tube through the mouth, camera zooms in, 18 (calibration) mark seen, the other (green) end as of now not connected to anything, video ends, what is the procedure that is being done?VIDEO LINK: 
Select and explain. 
A. Oral suction, B. Oropharyngeal suction, C. Nasogastric tube inse, D. Orogastric tube inseion
D: Orogastric tube inseion
Answer: D: Orogastric tube inseion 
Explanation: Ans. D. Orogastric tube inseion