# Please tell what's the correct hybridisation, magnetic behaviour, and formula of geometrical or optical isomer for the complexes $\left[Mn\left(CN{\right)}_{6}{\right]}^{-3}\phantom{\rule{0ex}{0ex}}\left[Co\left({C}_{2}{O}_{4}{\right)}_{3}{\right]}^{-3}\phantom{\rule{0ex}{0ex}}\left[Fe\left(CN{\right)}_{6}{\right]}^{-3}$

1. The hybridisation, geometry, magnetic behaviour for first three complexes is correctly evaluated.

2. The skeletal formulas for optical and geometrical formulas again for first three ones are correct.

3. Yes, only the optical isomer of [Co(C2O4)3]3- is possible.

The fourth complex isn't clearly visible so the correct answer cannot be provided.