Lanthanum is grouped with f-block elemen...

Lanthanum is grouped with f-block elements because

A

It has partially filled f -orbitals

B

It is just before Ce in the periodic table

C

It has both partially filled f and d-orbitals

D

The properties of Lanthanum are very similar to the elements of 4f block

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The correct Answer is:

D

Due to similarity in properties.

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