The correct order of $K_a$ in aqueous solution at $298 \ K$ for the hydrides of group $16$ elements is:
- A$H_2O > H_2S > H_2Se > H_2Te$
- B$H_2Te > H_2Se > H_2S > H_2O$
- C$H_2O > H_2Te > H_2Se > H_2S$
- DNone of these
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