What is the oxidation number of hydrogen in a compound of ?A –1B 0C +1D +2

The oxidation number of hydrogen in a compound is usually +1. However, it can be -1 when it is combined with metals in binary hydrides. In its elemental form (H2), the oxidation number of hydrogen is 0. Therefore, without specifying the compound, we cannot definitively determine the oxidation number of hydrogen. It could be -1, 0, or +1. The option D (+2) is not a common oxidation state for hydrogen in most compounds.