Explanation
$$\textbf{Correct option:}$$ (C)
$$\bullet$$ The metals are a group of elements located on left side of the periodic table and non- metals are a group of elements located on the right side of the periodic table (except for hydrogen, which is on the top left).
$$\bullet$$ Noble gas are present in the last column of the peridic table.
$$\textbf{Explanation for correct option:}$$
$$\textbf{(C)}$$
$$\bullet$$ Element C is a non- metal.
$$\bullet$$ Non- metal oxides react with water to form acidic solutions which liberates Hydrogen ions in the solution.
$$\bullet$$ Therefore, non-metals form acidic oxides which is element C.
$$\textbf{Explanation for incorrect option:}$$
$$\textbf{(A)}$$
$$\bullet$$ Element A is a metal.
$$\bullet$$ Metal forms basic oxides.
$$\textbf{(B)}$$
$$\bullet$$ Element B is a metal.
$$\textbf{(D)}$$
$$\bullet$$ Element D is a noble gas.
$$\bullet$$ Noble gas will not form any kind of oxide.
$$\textbf{Conclusion:}$$
Hence, the correct option is (C).
Döbereiner's triads were an early attempt to sort the elements into some logical order by their physical properties. It was by reported Johann Wolfgang Döbereiner's in 1817.
He also noted that quantifiable properties of elements (e.g. atomic mass) in a triad followed a trend whereby the value of the middle element in the triad would be exactly or nearly equal to the arithmetic mean of values for that property of the other two elements.
So, the correct option is B.
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