Spin only magnetic moment in BM of [Fe(CO)₄(C₂O₄)]⁺ is :

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A) : Lithium salts are hydrated.

Reason (R) : Lithium has higher polarising power than other alkali metal group members.

In the light of the above statements, choose the most appropriate answer from the options given below :

The incorrect expression among the following is :

Which one of the following statements is incorrect?