The answer to this question is A. H20 is not H202. It will be an entirely different compound. A lot of people are aware that H20 is water. H202 is known as hydrogen peroxide. A lot of people are more familiar with this as a disinfectant.
This may be used to clean wounds or to clean different surface areas. The ones that are being sold over the counter are known to be colorless, but in its purest form, it is color blue and solid. Some people think that H202 therapy is useful, but people are advised against this type of treatment as it can kill people when they take too much of it.