Option 1: 574

This option is not the correct answer. A reading of 574 Celsius would be much higher than the corresponding readings on both the Kelvin and Fahrenheit scales.

Option 2: 301

This option is the correct answer. A reading of 301 Celsius would be equal to the same reading on both the Kelvin and Fahrenheit scales.

Option 3: 273

This option is not the correct answer. The reading of 273 Celsius is equivalent to 0 Kelvin and 523.4 Fahrenheit.

Option 4: 232

This option is not the correct answer. A reading of 232 Celsius is equivalent to 505.6 Kelvin and 449.6 Fahrenheit.

In summary, the correct corresponding reading on a Celsius thermometer for a sample where the Kelvin and Fahrenheit thermometers give the same reading would be 301.