The nurse aspirates fasting fluid from a client's nasogastric tube before giving a medication. Which pH result supports that the tube is in the stomach?

1. 1A pH of 6.5
2. 2A pH of 7.5
3. 3A pH of 3
4. 4A pH of 8

Source: Nursing Skills, 2nd edition (Open RN, Chippewa Valley Technical College, 2023), Administration of Enteral Medications: Enteral Tube Medication Administration. Licensed under CC BY 4.0.