Pick out the correct statement with respect $$[Mn(CN)_6]^{3-}$$:

A

It is $$d^2sp^3$$ hybridised and octahedral

B

It is $$dsp^2$$ hybridised and square planar

C

It is $$sp^3d^2$$ hybridised and octahedral

D

It is $$sp^3d^2$$ hybridised and tetrahedral