The manganate and permanganate ions are tetrahedral, due to

Question

( A ) The $\pi$ bonding involves overlap of d orbitals of oxygen with d orbitals of manganese
( B ) There is no $\pi$ bonding
( C ) The $\pi$ bonding involves overlap of p orbitals of oxygen with d orbitals of manganese
( D ) The $\pi$ bonding involves overlap of p orbitals of oxygen with p orbitals of managanese