Which of the following sets correctly represents the increase in the paramagnetic property of the ions?

• Correct answer
  A

  ${\mathrm{Cu}}^{2+}<{\mathrm{V}}^{2+}<{\mathrm{Cr}}^{2+}<{\mathrm{Mn}}^{2+}$
• B

  ${\mathrm{Cu}}^{2+}<{\mathrm{Cr}}^{2+}<{\mathrm{V}}^{2+}<{\mathrm{Mn}}^{2+}$
• C

  ${\mathrm{Mn}}^{2+}<{\mathrm{V}}^{2+}<{\mathrm{Cr}}^{2+}<{\mathrm{Cu}}^{2+}$
• D

  ${\mathrm{Mn}}^{2+}<{\mathrm{Cu}}^{2+}<{\mathrm{Cr}}^{2+}<{\mathrm{V}}^{2+}$

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