Concept:The relation is “physical quantity : its SI unit.”
Explanation:Electric charge is measured in coulomb.
So, we need another quantity paired with its correct SI unit.
Frequency is measured in hertz, so
Frequency:Hertz matches.
Force is measured in newton, not pascal.
Temperature is measured with a thermometer, not a unit.
Resistance is measured in ohm, not siemens.
Answer:Frequency : Hertz