A ${\mathrm{K}\mathrm{M}\mathrm{n}\mathrm{O}}_4$ solution can be standardised by titration against ${\mathrm{A}\mathrm{s}}_2{\mathrm{O}}_3\left(\mathrm{s}\right).\mathrm{ }$ A 0.1156 g sample of ${\mathrm{A}\mathrm{s}}_2{\mathrm{O}}_3$ requires 27.08 mL of the $\mathrm{K}\mathrm{M}\mathrm{n}{\mathrm{O}}_4$ (aq) for its titration. What is the molarity of the ${\mathrm{K}\mathrm{M}\mathrm{n}\mathrm{O}}_4\left(\mathrm{a}\mathrm{q}\right)$ [As = 75]. 

• Correct answer
  A

  0.0172 M
• B

  1.0172 M
• C

  0.172 M
• D

  0.9172 M

Hence, the correct answer is option: 'A'.