Polarisation may be called as the distortion of the shape of an anion by an adjacently placed cation is maximum polarization is brought about by a cation of high charge

Larger polarising power will result from smaller size and higher charge on the cation, which can polarise the electron charge density of the surrounding anion to a greater extent.
Polarizability will be greater for anions that are bigger in size and charged more intensely.
So, choice C is the right one.