Arrange the following solutions in increasing hydronium ion concentration. The solutions are (P) $$0.1\,\mathrm{M\ HCl}$$, (Q), $$0.1\,\mathrm{M\ H_2SO_4}$$, (R), $$0.001\,\mathrm{M\ NH_4OH}$$, and (S), $$0.001\,\mathrm{M\ Ca(OH)_2}$$.

The correct order will be

A

P > Q > R > S

B

Q > P > S > R

C

S > R > Q > P

D

S > R > P > Q