Statement: I- Coordination entity and coordination polyhedra are synonymous.
Statement:II– Coordination number of central metal ion is the sum of sigma and Pi bonds present between central metal ion and ligands.

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Statement I is correct and Statement II is incorrect.

Statement I and Statement II both are incorrect

Statement I and Statement II both are correct.

Statement I is incorrect and Statement II is correct

answer is D.

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Detailed Solution

I) $K_{4} [Fe {(CN)}_{6}]$ - Coordination entity is the species present in the square bracket i.e., it includes ${Fe}^{+ 2}$ and $6 {CN}^{-}$ ions.
Coordination polyhedra is the spatial arrangement of various ligands around central metal ion which gives the geometry of the complex.
II) Coordination number of central metal ion is the total number of sigma bonds formed by it with the surrounding ligands.