Which of the following compounds has chlorine in +5 oxidation state?

The correct option is A $HCl{O}_4$
In $HCl{O}_3$, the oxidation state of $Cl$ is +5.
The oxidation state of hydrogen = +1, The oxidation state of oxygen = -2
Let oxidation state of chlorine is x,
In $HCl{O}_4,1+x+4(-2)=0$, x = + 7
In $HCl{O}_3,1+x+3(-2)=0$, x = + 5
In $HCl{O}_2,1+x+2(-2)=0$, x = +3
In HCl, 1+x =0, x = -1
In $HCl{O}_4$ , it has +5 oxidation state.