The single replacement reaction that can occur is option A
Why can fluorine replace chlorine in a single replacement reaction?
Because of its higher reactivity, fluorine takes the place of chlorine in single replacement reactions. Because of its strong electronegativity, which draws electron density, chlorine's bond with the other atom is weakened.
It can also create stronger bonds with other atoms thanks to its smaller atomic radius, which releases more energy during the reaction. Fluorine is preferred in displacement reactions over chlorine due to these factors.