The SI unit used in measuring temperature is Kelvin. However, Celsius is also commonly used in everyday measurements, such as for the temperature of a hot cup of coffee.
If you're looking for the standard SI unit, the correct answer is:
Kelvin
If the context allows for commonly used temperature scales, Celsius would also be considered appropriate for measuring the temperature of a cup of coffee.
In summary, the correct answer according to SI units is Kelvin.
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