The manganate and permanganate ions are tetrahedral, due to:

A

Ther e is no $$\pi-$$ bonding

B

The $$\pi-$$ bonding involves overlap of p-orbitals of oxygen with p-orbitals of manganese

C

The $$\pi-$$ bonding involves overlap of d-orbitals of oxygen with d-orbitals of manganese

D

The $$\pi-$$ bonding involves overlap of p-orbitals of oxygen with d-orbitals of manganese