The Carbylamine test (also known as the Isocyanide test) is a specific chemical test used to detect Primary Amines (both aliphatic and aromatic).

Reaction: When a primary amine is heated with chloroform ($CHCl_3$) and alcoholic potassium hydroxide ($KOH$), it forms isocyanides (carbylamines), which are substances with a very unpleasant, foul smell. $R-NH_2 + CHCl_3 + 3KOH \xrightarrow{\Delta} R-NC + 3KCl + 3H_2O$

Secondary and tertiary amines do not undergo this reaction. Therefore, the correct option must be the one representing a primary amine ($R-NH_2$).