The Oxidation Number of the Hydrogen Atom in InH₃ Is $\rightarrow$

The oxidation number of the hydrogen atom in InH₃ is _____.

A) +2
B) -2
C) -1
D) 0
E) -3
Refer to the reaction below for 33-34.
Given:
2RbOH + H₂SO₄ $\rightarrow$ Rb₂SO₄ + 2H₂O