Answer : The correct option is, K
Explanation :
S.I : It is known as the international System of Units. It is defined as a scientific method that express the magnitude of the several basics units.
As we know that there are seven basic units in the system from which the other units are derived.
The seven base unit used are, meter for length, kilogram for mass, second for time, ampere for current, kelvin for temperature, mole for amount of substance and candela for intensity.
As per question, the symbol represent S.I unit for the temperature is, Kelvin which is denoted as, (K).
Hence, the correct option is, K