Thank you for reporting, we will resolve it shortly
Q.
Europium is
The d-and f-Block Elements
Solution:
Europium is a f-block elements as it follows the general electronic configuration of the f-block elements
$\left(4f^{1-45} 5d^{0,1}6s^{2}\right) Eu=\left[Xe\right]4f^{1}6s^{2}$