Which one of the following is not a unit of British system of units?

Options

A. foot
B. metre
C. pound
D. second

Explanation

To determine which of the following options is not a unit of the British system of units, we can analyze each option:

1. **Identify the units in the British system (FPS)**:
- The British system of units is commonly referred to as the FPS system, where:
- **F** stands for Foot (unit of length)
- **P** stands for Pound (unit of mass)
- **S** stands for Second (unit of time)

2. **Evaluate each option**:
- **Option A: Foot** - This is a unit of length in the British system.
- **Option B: Meter** - This is a unit of length in the metric system, not the British system.
- **Option C: Pound** - This is a unit of mass in the British system.
- **Option D: Second** - This is a unit of time in the British system.

3. **Conclusion**:
- Among the options provided, the only unit that does not belong to the British system of units is **Meter**.

Therefore, the answer is **Option B: Meter**.

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