Associated colloid among the following is:

Options

A. Enzymes
B. Proteins
C. Starch
D. Sodium stearate

Explanation

To determine which of the given options is an associated colloid, we need to understand the concept of associated colloids.

### Step-by-Step Solution:

1. **Definition of Associated Colloids**:
Associated colloids are colloidal systems that consist of molecules which have both lyophilic (solvent-attracting) and lyophobic (solvent-repelling) parts. These compounds can exist in a true solution at low concentrations but will aggregate to form colloidal solutions at higher concentrations.

2. **Analysis of Options**:
...