JEE CHEMISTRY MCQ: CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES

$B$ has a smaller first ionisation enthalpy than $Be$. Consider the following statements :

I) It is easier to remove $2p$ electron than $2s$ electron

II) $2p$ electron of $B$ is more shielded from the nucleus by the inner core of electrons than the $2s$ electrons of $Be$

III) $2s$ electron has more penetration power than $2p$ electron
IV) atomic radius of $B$ is more than $Be$ (atomic number $B = 5$, $Be = 4$)
The correct statements are