SI unit of temperature is __________.
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → Kelvin
The kelvin (K) is one of the seven base units of the SI system, and it is the unit of thermodynamic temperature. Its zero, 0 K, is absolute zero, the lowest possible temperature (−273.15°C).
The degree Celsius is used for everyday temperatures and has the same step size as the kelvin (temperature in K = temperature in °C + 273.15), but it is not the base unit. The Fahrenheit and Rankine scales are not SI units at all.