The most electropositive element possesses the electronic configuration

Which of the following is the strongest acid?

If the valence shell electronic configuration for an element is $ns^2 np^5$,this element will belong to the group of

Which one of the following orders represents the correct sequence of increasing basic nature of the given oxides?

Given below are two statements:
Statement $I$ : Both metal and non-metal exist in $p$ and $d-$block elements.
Statement $II$ : Non-metals have higher ionisation enthalpy and higher electronegativity than the metals.
In the light of the above statements,choose the most appropriate answer from the option given below:

The electronic configuration of three elements $A, B$ and $C$ are given below. The molecular formula of the compound formed from $B$ and $C$ will be
$A : 1s^2, 2s^2, 2p^6$
$B : 1s^2, 2s^2, 2p^6, 3s^2, 3p^3$
$C : 1s^2, 2s^2, 2p^6, 3s^2, 3p^5$