Resistivity is very high for

Options

A. metals
B. alloys
C. semiconductors
D. insulators

Explanation

To determine which materials have very high resistivity, we will analyze the properties of different types of materials: metals, alloys, semiconductors, and insulators.

### Step-by-Step Solution:

1. **Understand Resistivity**:
- Resistivity is a property of a material that quantifies how strongly it opposes the flow of electric current. The higher the resistivity, the more the material resists current flow.

2. **Identify Material Types**:
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