JEE Main 2021 Chemistry question

Arrange the following metal complex/compounds in the increasing order of spin only magnetic moment. Presume all the three, high spin system. (Atomic numbers Ce = 58, Gd = 64 and Eu = 63.) (a) (b) (c) Answer is :

• (A)(b) < (a) < (c)
• (B)(c) < (a) < (b)Correct
• (C)(a) < (b) < (c)
• (D)(a) < (c) < (b)