An aqueous solution of titanium chloride, when subjected to magnetic measurement, measured zero magnetic moment. Assuming the octahedral complex in aqueous solution, the formulae of the complex is :
a. [Ti(H2O)6]Cl2
b. [Ti(H2O)6]Cl4
c. [TiCl3(H2O)3]
d. [TiCl2(H2O)4]