Which of the following sets of elements have the strongest tendency to form anions?

The elements with the following atomic numbers belong to the same group:

Given below are two statements :
Statement $I$ : An element in the extreme left of the periodic table forms acidic oxides.
Statement $II$ : Acid is formed during the reaction between water and oxide of a reactive element present in the extreme right of the periodic table.
In the light of the above statements,choose the correct answer from the options given below :

What is the correct order comparing the acid strengths of $HF$,$HCl$,$HBr$,and $HI$?

The chemical properties of $Li$ and $Mg$ are similar because:

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