What is the name of the complex formed by the coordination reaction of carbon monoxide?

What are organometallic compounds? Explain in detail.

The correct pair of orbitals involved in $\pi$-bonding between metal and $CO$ in metal carbonyl complexes is

Which of the following is called Wilkinson's catalyst?

What type of bonding is present in the $Fe-C$ bond of $Fe(CO)_5$?

Given below are two statements:
Statement $I$: The $M - C \sigma$ bond is formed by the donation of a lone pair of electrons on the carbonyl carbon into a vacant orbital of the metal.
Statement $II$: The $M - C \pi$ bond is formed by the donation of a pair of electrons from a filled $d$-orbital of the metal into the vacant antibonding $\pi^*$ orbital of carbon monoxide.
In the light of the above statements, choose the correct answer from the options given below: