Using different reaction conditions nickel reacts with (p) $$\text{Cl}^-$$, (q) $$\text{CN}^-$$, (r) CO and (s) a small amount of Al. Choose the incorrect statement.

(p), (q) and (r) respectively can result in tetrahedral, octahedral and square planar geometries around nickel

Ligand (p) and (q) leads to homoleptic complex formation wherein final electronic configuration shows maximum multiplicity in case of (p)

Ligand (r) reacts only in reducing medium to form organometallic compound

In case of (s) formation of spongy product with large surface drive reduction reaction of $$\text{C} = \text{C}$$ compounds