The correct answer is D. Ampere/volt.
A watt is a unit of power, which is the rate at which energy is transferred or converted. It is equal to one joule per second.
An ampere is a unit of electric current, which is the flow of electric charge.
A volt is a unit of electric potential difference, which is the difference in electric potential between two points.
An ohm is a unit of electrical resistance, which is the opposition to the flow of electric current.
Option A, joule/second, is equivalent to watt because power is the rate at which energy is transferred or converted, and energy is measured in joules.
Option B, ampere รย volt, is equivalent to watt because power is also equal to current times voltage.
Option C, (ampere)2 รย ohm, is not equivalent to watt because power is not equal to the square of current times resistance.
Option D, ampere/volt, is not equivalent to watt because power is not equal to current divided by voltage.