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The correct order of increasing [H3O+] in the following aqueous solutions is:

(a) 0.01 M H2S < 0.01 M H2SO4<0.01 M NaCl<0.01M NaNO2

(b) 0.01 M NaCl< 0.01 M NaNO2<0.01 M H2S< 0.01 M H2SO4

(c) 0.01 M NaNO2<0.01 M NaCl<0.01 M H2S<0.01 M H2SO4

(d) 0.01 M H2S<0.01 M NaNO2<0.01 M NaCl<0.01 M H2SO4