Four aqueous solutions are listed below.

W.     ${\text{0.100 mol}}\,{\text{d}}{{\text{m}}^{ - 3}}{\text{ HN}}{{\text{O}}_{\text{3}}}{\text{(aq)}}$

X.     ${\text{0.001 mol}}\,{\text{d}}{{\text{m}}^{ - 3}}{\text{ HN}}{{\text{O}}_{\text{3}}}{\text{(aq)}}$

Y.     ${\text{0.100 mol}}\,{\text{d}}{{\text{m}}^{ - 3}}{\text{ KOH(aq)}}$

Z.     ${\text{0.001 mol}}\,{\text{d}}{{\text{m}}^{ - 3}}{\text{ KOH(aq)}}$

What is the correct order of increasing pH of these solutions?

A.     ${\text{W}} < {\text{X}} < {\text{Y}} < {\text{Z}}$

B.     ${\text{W}} < {\text{X}} < {\text{Z}} < {\text{Y}}$

C.     ${\text{X}} < {\text{W}} < {\text{Y}} < {\text{Z}}$

D.     ${\text{X}} < {\text{W}} < {\text{Z}} < {\text{Y}}$

B