Carbylamine reaction is given by `underline ("secondary amines")`.

Explanation

### Step-by-Step Solution:

1. **Understanding the Carbylamine Reaction**:
The Carbylamine reaction is a chemical reaction that is specifically characteristic of primary amines. It involves the reaction of a primary amine with chloroform (CHCl3) in the presence of a strong base, typically potassium hydroxide (KOH), to produce an isocyanide (carbylamine).

2. **Identifying the Reactants**:
The general reaction can be represented as:
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