Among the following elements whose symbols are named after the planet names

In the periodic table, for some elements symbols are given based on name of the planet. Let us see the below table.

    $\begin{array}{ccc}\text{Element}& \text{Name of the Planet}& \text{Symbol}\\ \text{Uranium}& \text{Uranus}& \text{U}\\ \text{Neptunium}& \text{Neptune}& \text{Np}\\ \text{Plutonium}& \text{Pluto}& \text{Pu}\end{array}$