Which of the following statement(s) is/are not correct?
A. La(OH)₃ is less basic than Lu(OH)₃.
B. In lanthanide series, ionic radius of Ln³⁺ ion decreases.
C. La is actually an element of transition series rather than lanthanides.
D. Atomic radii of Zr and Hf are same because of lanthanide contraction.
