In which among the following pairs are both the elements metalloids?

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 :

The basis of keeping the elements in the same group of a periodic table is

$Fe x_2$ and $Fe y_3$ are known when $x$ and $y$ are :

Which of the following sets has the strongest tendency to form anions?

Which of the following elements is a metalloid?