In which vehicle must "safety shoes" be present?

1. AIn every motor vehicle whose permissible total weight is more than 5,000 kg, except a bus.
2. BIn every commercial vehicle, of any weight, except a bus.
3. COnly in a vehicle whose permissible total weight is 4,000 kg or less, including a bus.
4. DIn every vehicle whose permissible total weight is 3,500 kg or less, except a bus.

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