Which of the following is a non-renewable source of-energy ?

Options

A. coal
B. water
C. air
D. none of these

Explanation

To determine which of the following is a non-renewable source of energy, we need to analyze the options provided: coal, water, air, and none of these.

### Step-by-Step Solution:

1. **Understanding Non-Renewable Sources of Energy**:
- Non-renewable sources of energy are those that cannot be replenished quickly or at all once they are used. This means that once we exhaust these resources, they will take a very long time to form again, or they may be lost forever.

2. **Identifying the Options**:
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