What is the temperature of the middle most layer of the Sun's atmosphere?

It’s temperature is 5,500 degrees celsius to 6,000 degrees celsius.
It’s temperature is 6,000 degrees celsius to 20,000 degrees celsius.
It’s temperature is 20,000 degrees celsius to 2,000,000 degrees celsius.
It’s temperature is 2,000,000 degrees celsius to 3,000,000 degrees celsius.