Three elements $X,YandZ$ are in the $3^{rd}$ period of the periodic table. The oxides of $X,Y‘andZ$, respectively, are basic amphoteric and acidic, the correct order of the atomic numbers of $X,YandZ$ is:

Q. Three elements $X,Y$ and $Z$ are in the $3^{rd}$ period of the periodic table. The oxides of $X,Y$ and $Z$, respectively, are basic, amphoteric and acidic. The correct order of the atomic numbers of $X,Y$ and $Z$ is :

Q. x, y and z are three elements of 3rd period such that their oxides are acidic, amphoteric and basic respectively. The order of atomic number of the elements is:

Q. The elements x, y and z are present in one period of the periodic table. Chemically their oxides are acidic, amphoteric and basic respectively. When these elements are arranged in ascending order of atomic number they are :

Q. $A$, $B$ and $C$ are hydroxy-compounds of the elements $X$, $Y$ and $Z$ respectively. $X$, $Y$ and $Z$ are the same period of the periodic table. $A$ gives an aqueous solution of $pH$ less than seven, $B$ reacts with both strong acids and strong alkalis. $C$ gives an aqueous solution which is strongly alkaline.
Which of the following statements is/are true?
I: The three elements are metals.
II: The electronegativities decrease form $X$ to $Y$ to $Z$
III: The atomic radius decreases in the order $X$, $Y$ and $Z$.
IV: $X$, $Y$ and $Z$ could be phosphorus, aluminium and sodium respectively.