Oxidation, reduction and redox equations

Easy

Which of the following assignments of oxidation state is correct?

Oxygen in $F2O\text{F}_2\text{O}$ is $- 2$

Chlorine in $NaClO2\text{NaClO}_2$ is $+ 3$

Hydrogen in $CaH2\text{CaH}_2$ is $+ 1$

Sulfur in $Na2S2O3\text{Na}_2\text{S}_2\text{O}_3$ is $+ 4$

Oxidation, reduction and redox equations Questions