Which one of the following is the correct relation between the Kelvin temperature (T) and the Celsius temperature (tc)?

The relationship between the Kelvin scale (T) and the Celsius scale (tc) is defined by the offset of the absolute zero point. According to the standard conversion formula, the temperature in Kelvin is obtained by adding 273.15 to the temperature in Celsius. Specifically, 0°C corresponds to 273.15 K, and the boiling point of water at 100°C corresponds to 373.15 K. While some simplified contexts use 273 as a rounded figure, the precise scientific relation is T = tc + 273.15. This formula allows for the conversion between the two scales, which share the same magnitude for a unit change (1 K = 1°C) but differ in their starting points. Therefore, the correct mathematical expression representing this relation is T = tc + 273.15.