A chloride dissolves appreciably in cold water. When placed on a platinum wire in Bunsen flame, no distinctive color is noticed. Which one is cation?

• A

  ${\mathrm{Mg}}^{2+}$

• B

  ${\mathrm{Ba}}^{2+}$

• C

  ${\mathrm{Na}}^{+}$

• D

  ${\mathrm{Ca}}^{2+}$