Among the following the most polar bond is (A) F-N (B) F-C (C) F-O (D) F-F

Hello Student
Polarity of bonds depends on the electronegativity difference between the two bonded elements.
F is the most electronegative element known. F is common among all the four molecules. So, the polarity would depend on the other element which is bonded with F. Here C is the most electropositive element so the most polar bond would be the F-C bond.