Answer: Option 'C' is correct.
Explanation:
All machinery must be equipped with an emergency cutoff switch within reach of the operator for the sake of safety of the employee who are operating the machines.
Like ,Car is type of machinery which also have an emergency device like air bag etc.
No machinery contain a fire extinguisher inside of it.
A shadow light is not compulsory for all type of machinery.
All machinery are not supposed to have a noise making device such as a horn, within reach of the operator.
But safety device like an emergency cutoff switch must be equipped in all type of machinery.
Hence, Option 'C' is correct.