Which of the following is the si unit used to measure length?
a. kilogram
b. liter
c. meter
d. kelvin

Answer : The SI unit to measure length is "meter".

Explanation :

SI unit means the international system of units. There are some fundamental units and some of the units are derived from fundamental units.

The SI units of some quantities are as follows :

Hence, the correct option is (b) " meter ".              

Option c: Meter.

Explanation:

The meter is the unit of length in the international system of units. That system establishes standard measure at an international level for the following units:

The meter is defined as the distance that light travels in vacuum in ratio of of a second.

answer and explanation;

conduction, convection, radiation