The normal temperature of human body on the Kelvin scale is

To convert Celsius to Kelvin, add 273.15 because 0 °C equals 273.15 K according to the SI definition of the Kelvin scale [1]. The conversion relation is K = °C + 273.15, which directly applies to human body temperature given in Celsius [2]. Using the commonly quoted normal human core temperature of about 37 °C, the Kelvin value is 37 + 273.15 = 310.15 K. For multiple-choice purposes this is rounded to 310 K, matching option 4; some sources explicitly state the normal body temperature as ≈310.15 K (often reported as 310 K in textbooks and practice problems) .

Sources

1. [1] https://www.nist.gov/pml/owm/si-units-temperature
2. [2] https://en.wikipedia.org/wiki/Conversion_of_scales_of_temperature