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Which is correct statement ?...

Which is correct statement ?

A

`._(92)U` is heaviest primordial element

B

`Ce, Pr, Tb, Dy` and `Nd` can exhibit `+2` oxidation state

C

`Pa, U,NP,Lr` can have `6d'` configuration

D

Ln do not react with acids to liberate `H_(2)` gas

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