[Cu(en)2]^+². The coordination number of the given complex is?

Both A and B

None of these

The complex [Cu(en)2]^+² contains 2 ethylenediamine (en) ligands.

Each en is a bidentate ligand, donating 2 lone pairs, so:

2 ligands × 2 = 4 coordinate bonds → Coordination number = 4