Which of the following statements is not true for halogens?

1. Fluorine is the most electronegative element and only shows $-1$ oxidation state (except in ${\text{F}}_2$ where it is $0$). Other halogens show positive states like $+1,+3,+5,+7$ (Statement A is true).2. All halogens are electron-acceptors (oxidizing agents) (Statement B is true).3. All halogens form oxyacids like $\text{HOX}$ (Statement C is true).4. Chlorine has a higher electron-gain enthalpy than Fluorine because of interelectronic repulsions in the small Fluorine atom (Statement D is true).Wait, based on the specific exam question, Statement A is the focus: Fluorine is unable to show positive oxidation states. However, all options provided in standard keys suggest "All but fluorine show positive oxidation states" is a true statement. Let's re-verify the "not true" part. Usually, Fluorine forms only one oxyacid ($\text{HOF}$), but the question asks for a general trend.Note: In some interpretations, "All form monobasic oxyacids" might be considered for multiple types (${\text{HXO, HXO}}_2$ etc), which Fluorine doesn't do. However, A is the most commonly cited fundamental difference.