The observed effective magnetic moment of two octahedral complexes, $$K_4[Mn(CN)_6] \cdot 3H_2O$$ (X) and $$K_4[Mn(SCN)_6]$$ (Y) are 2.18 BM and 6.06 BM, respectively. Which of the following is correct? I. X is a low spin complex with two unpaired electrons II. Y is a high spin complex with 5 unpaired electrons III. X is a high spin complex with two unpaired electrons IV. Y is a low spin complex with 5 unpaired electrons