Which of following compound contains $\mathbf { 3 }$ unpaired electrons?\\
(4) $\left[ \mathrm { CoF } _ { 6 } \right] ^ { 4 - }$\\
(B) $\left[ \mathrm { TiF } _ { 6 } \right] ^ { 3 - }$\\
(C) $\mathrm { V } _ { 2 } \mathrm { O } _ { 5 }$\\
(D) $\left[ \mathrm { Fe } ( \mathrm { CN } ) _ { 6 } \right] ^ { 3 - }$