Which pair of elements with the given atomic numbers is expected to have similar properties?

Considering the elements $B, C, N, F,$ and $Si,$ the correct order of their non-metallic character is:
$(a)$ $B > C > Si > N > F$
$(b)$ $Si > C > B > N > F$
$(c)$ $F > N > C > B > Si$
$(d)$ $F > N > C > Si > B$

Which of the following orders of acidic strength is correct?

In the long form of the periodic table,the $d$-block element which forms an interstitial hydride is

Among the statements $(I-IV)$,the correct ones are:
$(I)$ $Be$ has smaller atomic radius compared to $Mg$.
$(II)$ $Be$ has higher ionization enthalpy than $Al$.
$(III)$ Charge/radius ratio of $Be$ is greater than that of $Al$.
$(IV)$ Both $Be$ and $Al$ form mainly covalent compounds.

Consider the following four elements,which are represented according to the long form of the periodic table. Here $W$,$Y$,and $Z$ are left,up,and right elements with respect to the element $X$,and $X$ belongs to the $16^{th}$ group and $3^{rd}$ period. Then,according to the given information,the incorrect statement regarding the given elements is: