Identify the type of tariff the consumer is charged Rs 4 per unit if the consumer does not exceed 50 KWh, Rs 3.50 per unit if the consumer does not exceed 50 KWh but less than 200 kilowatt hour, and Rs 3 per KWh if consumer exceeds 200 kilowatt hour.

d
Explanation: Step rate tariff is a group of flat rate tariff of decreasing unit charges for
higher range of conception. Charges per KWh are reduced for increas in power
consumption above different predefined step levels. This type of tariff takes into account
the fact of lower generation cost going to higher energy consumption consequent to
improvement of load factor