Answer:
A. a bond between carbon and oxygen
Explanation:
Please refer to attached section of periodic table to get an insight of the electronegativity values of the Hydrogen, carbon and oxygen atoms.
The bond polarity refers to the electronegativity difference between any two atoms joined through covalent linkage.
As per pauling's scale, Oxygen has a value of electronegativity as 3.44. To get a polar covalent bond between any two atoms, the electronegativity (E.N) difference should be less than 1.7 - 1.8 and more than 0.5.
Let's look at the E.N difference between mentioned bonds:
C-H bond: 2.55 - 2.20 = 0.35
C-O bond:2.55
-3.44= 0.89
C-C bond:2.55
-2.55 = 0
Therefore, the bond between Carbon and Oxygen would be most polar among all.
Hope it helps!
