Q45. The number of complexes from the following with no electrons in the $t _ { 2 }$ orbital is\\
$\mathrm { TiCl } _ { 4 } , \left[ \mathrm { MnO } _ { 4 } \right] ^ { - } , \left[ \mathrm { FeO } _ { 4 } \right] ^ { 2 - } , \left[ \mathrm { FeCl } _ { 4 } \right] ^ { - } , \left[ \mathrm { CoCl } _ { 4 } \right] ^ { 2 - }$\\
(1) 1\\
(2) 4\\
(3) 3\\
(4) 2