Answer:
The correct answer is option c.
Step-by-step explanation:
When someone walking across the floor the friction is the concept that works in between the feet and floor or rug or carpet which makes the exchange between floor to the person. Now the body of an individual has a static charge at the moment.
When the person touches the doorknob or any metal, electrons move from the body of that individual to the handle or knob through the fingertips as static discharge due to the electrical potential difference and the person gets an electric shock.
Thus, the correct answer is option C.