Answer: (A) Using a computer that has been opened for maintenance
Explanation:
When we use the computer system and it is opened for the maintenance then it may cause the electrical shock.
We always prevent ourselves from the open electrical appliances as the electric shock can be caused due to the physical contact with the devices that contain some electrical energy.
The electrical shock occur due to the electricity flow when the body comes in contact with the electrical appliances.
Therefore, Option (A) is the main cause of the electrical shock.
