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For f-block element, incorrect statement...

For f-block element, incorrect statement is

A

Ln with xf electrons has pink colour, then the Ln with `(14-x)f` electrons also pink colour

B

`EuH_(2)` & `YbH_(2)` are ionic hydrides

C

In 'An' complex formation order is `M^(+4) gt MO_(2)^(+2) gt M^(+3) gt MO_(2)^(+)`

D

Pr, Nd, Tb and Dy can exhibit `+4` oxistate both in oxides and halides

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