Answer: Kelvin
Explanation:
Temperature of the gas is defined as the degree of hotness or coldness of a body. It is expressed in units like [tex]^0C[/tex] and [tex]K[/tex]
These units of temperature are inter convertible.
As we know that there are seven fundamental SI units which are used to fine derived units . They are listed as:
1). Mass - Kilogram
2). Length - meter
3). Time - Seconds
4). Electric Current - Ampere
5). Amount of substance - Moles
6). Intensity of light - Candela
7). Temperature - Kelvin
Thus SI base unit of temperature is Kelvin.
