The question has two statements. Statement I and statement II.

Statement I: The metal-carbon bond in metal carbonyls possess $“\mathrm{\sigma }”$ character only.
Statement II: In metal carbonyls, the M – C $\sigma$ bond is formed by the donation of a pair of electrons from a filled d orbital of metal into the vacant antibonding$\mathrm{\pi }*$ orbital of carbon monoxide.

 In light of the given statements, choose the most appropriate answer from the options given below.