Identify the incorrect statement among the following statements: (a) \( 4 f \)-and \( 5 f \)-orb...

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Identify the incorrect statement among the following statements:
(a) \( 4 f \)-and \( 5 f \)-orbitals are equally shielded
(b) \( d \)-block elements show irregular and erratic chemical properties among themselves
(c) La and Lu have partially filled \( d \)-orbitals and no other partially filled orbitals
(d) The chemistry of various lanthanides is very similar
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