Conduction through holes is not possible in

Options

A. metals
B. intrinsic semiconductors
C. ionic solids
D. p type semiconductors

Explanation

To solve the question "Conduction through holes is not possible in:", we need to analyze the different options provided: metals, intrinsic semiconductors, ionic solids, and p-type semiconductors.

### Step-by-Step Solution:

1. **Understanding Holes**:
- Holes are defined as the absence of an electron in a semiconductor material. When an electron leaves its position (due to thermal energy or other means), it creates a 'hole' which can allow for the movement of charge.

2. **Analyzing Each Option**:
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