While naming binary acids, it should start the name with hydro-. The correct option is B.
A binary acid is indeed a binary compound that has the properties of an acid. It only consists of two elements: hydrogen and an electronegative nonmetal.
The rule for naming a binary acid is using a prefix hydro-. For instance, hydrochloric acid, hydrofluoric acid, etc.
Thus, the correct option is B.
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