In a well-known experiment, Wöhler heated ‘inorganic’ ammonium cyanate without air present. The reaction produced only ‘organic’ urea, $\text{CO(NH}_2)_2$. No other substances were produced in the reaction. What is the formula of the cyanate ion in ammonium cyanate?
- A$\text{CNO}^-$
- B$\text{CNO}_2^-$
- C$\text{CO}^-$
- D$\text{NO}^-$