Answer: Option (C) is correct.
Explanation:
Correct Option: Third-degree price discrimination.
When the different price is charged for every unit of consumption is called asfirst-degree price discrimination. It is also known as perfect price discrimination. In this type of discrimination, seller charge prices according to the consumers willingness to pay.
In second-degree price discrimination, different price is charged for different quantity of goods.
In third-degree price discrimination, different price is charged from different groups but the same price will be charged within the group. For example: the caste categories, SC, ST, OBC and general; here different fees is charged from different category.
In our question, Charging higher prices to residential customers than to industrial customers is an example of third-degree price discrimination.