The lowest fixed price is also called?

Price floor

The correct answer is option 1: Price floor

For certain goods and services, fall in price below a particular level is not desirable and hence the government sets floors or minimum prices for these goods and services. The government imposed lower limit on the price that may be charged for a particular good or service is called price floor. Most well-known examples of imposition of price floor are agricultural price support programmes and the minimum wage legislation.