The number of endothermic process/es from the following is ______ (A) $\mathrm{I}_2(\mathrm{~g}) \rightarrow 2 \mathrm{I}(\mathrm{g})$ (B) $\mathrm{HCl}(\mathrm{g}) \rightarrow \mathrm{H}(\mathrm{g})+\mathrm{Cl}(\mathrm{g})$ (C) $\mathrm{H}_2 \mathrm{O}(\mathrm{l}) \rightarrow \mathrm{H}_2 \mathrm{O}(\mathrm{g})$ (D) $\mathrm{C}(\mathrm{s})+\mathrm{O}_2(\mathrm{~g}) \rightarrow \mathrm{CO}_2(\mathrm{~g})$ (E) Dissolution of ammonium chloride in water