Match the entries of column I with appropriate entries of column II and choose the correct option out of the four options given.

(i)-(d), (ii)-(c), (iii)-(b), (iv)-(a)

The correct answer is option 2. (i)-(d), (ii)-(c), (iii)-(b), (iv)-(a).

Let us break down the reasoning for each compound and its corresponding IUPAC name:

1. \([Ni(CO)_4]\): 

The compound consists of a nickel atom surrounded by four carbon monoxide \((CO)\) ligands. The IUPAC naming convention for metal carbonyl complexes uses the prefix "carbonyl" for \(CO\) ligands, and "tetra-" for four ligands. The oxidation state of nickel in this compound is \(0\) (neutral complex). Hence, the name is tetracarbonylnickel(0).

2. \([Ni(CN)_4]^{2-}\):

The compound consists of a nickel atom surrounded by four cyanide \((CN)\) ligands. The IUPAC naming convention for complexes with cyanide uses the prefix "cyanido". The prefix "tetra-" is used for four ligands. The overall charge on the complex is \(-2\), and the oxidation state of nickel here is \(+2\). Hence, the name is tetracyanidonickelate(II).

3. \([Cu(NH_3)_4]^{2+}\): 

The compound consists of a copper atom surrounded by four ammonia \((NH_3)\) ligands. The IUPAC naming convention for ammonia ligands uses the prefix "ammine". The prefix "tetra-" is used for four ligands. The overall charge on the complex is \(+2\), and the oxidation state of copper is \(+2\). Hence, the name is tetramminecopper(II).

4. \([FeCl_4]^{2-}\): 

The compound consists of an iron atom surrounded by four chloride \((Cl^-)\) ligands. The IUPAC naming convention for chloride ligands uses the prefix "chlorido". The prefix "tetra-" is used for four ligands. The overall charge on the complex is \(-2\), and the oxidation state of iron is \(+2\). Hence, the name is tetrachloridoferrate(II).

Therefore, the correct matching is: (i)-(d), (ii)-(c), (iii)-(b), (iv)-(a).