Which of the following has minimum gold number ?

Options

A. Gelatin
B. Starch
C. Albumin
D. Blood

Explanation

To determine which substance has the minimum gold number, we need to understand what a gold number is and compare the gold numbers of the given substances.

### Step-by-Step Solution:

1. **Definition of Gold Number**:
The gold number is defined as the minimum weight of a protective colloid required to prevent the coagulation of 10 ml of a standard gold sol when 1 ml of a 10% sodium chloride solution is added. A protective colloid is a substance that stabilizes a colloidal solution and prevents its coagulation in the presence of electrolytes.

2. **Gold Numbers of Given Substances**:
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