Which question are you asking ?
1st block wala bro
Inner transition elements are nothing but f block elements. But the electronic configuration doesn't look like it's f block elements.
It does the differentiating electron enters into f-subshell of (n-2)f-subshell and the general electronic configuration of f-block is matched by the given configuration.
I'm sorry, plz ignore post 2.
According to aufbau principle, the electronic configuration can be written as
Yeah there must be some fault with question Thanks everyone