Hello,

In this question two cases can be made-

• If the resistors are in series then by formula H=I×I×R the resistor with highest resistance will produce the highest amount of heat. We use this formula because current is for each resistor but voltage is not. So Q will produce highest heat.
• If the resistor are in parallel then by formula H=V×V/R the resistor with lowest resistance will produce the highest amount of heat. In this case the resistance will be R.