Which one is an incorrect statement?

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(B) The correct answer is $B$. Hydrogen does not always show $+1$ oxidation state. In metal hydrides like $NaH$,$CaH_2$,and $LiH$,hydrogen exhibits a

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Hydrogen always shows $+1$ oxidation state in combined state.

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(B) The correct answer is $B$. Hydrogen does not always show $+1$ oxidation state. In metal hydrides like $NaH$,$CaH_2$,and $LiH$,hydrogen exhibits a $-1$ oxidation state. Fluorine is the most electronegative element and always shows $-1$ in compounds. Sodium,being an alkali metal,always shows $+1$. Calcium,an alkaline earth metal,always shows $+2$.

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