I think its 5 I have not learned this so it is my best guess
The pH value indicates the degree of acidity or alkalinity of a solution. In this case, the human body fluids. When the value is 0, the pH is acid, it is 14, we speak of an alkaline pH, and 7 indicates a neutral value. Inside the body, the pH may vary according to the body, and the specialists argue that do not have to be the same everywhere.
The answer should be neutrons electrons and protons
I would say try the first answer
A reaction might happen or nothing might happen try one of them don’t know if I’m right though!
