I think it might be D but wanted to check:
Where high voltage is being used in a factory, it should be:
a. Outside the working area
b. Incased in a concrete building
c. Suitably enclosed with warning signs
d. Outside the building
Where high voltage is being used in a factory, it should be:
a. Outside the working area
b. Incased in a concrete building
c. Suitably enclosed with warning signs
d. Outside the building