Which of the following statement is not correct? (1) \( \mathrm{La}(\mathrm{OH})_{3} \) is less ...

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Which of the following statement is not correct?
(1) \( \mathrm{La}(\mathrm{OH})_{3} \) is less basic than \( \mathrm{Lu}(\mathrm{OH})_{3} \)
(2) In Lanthanide series, ionic radius of \( \operatorname{Ln}^{3+} \) ions decreases
(3) La metal is actually an element of transition series rather than of lanthanide series
(4) Atomic radii of \( \mathrm{Zr} \) and \( \mathrm{Hf} \) are almost same because of lanthanide contraction
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