To solve this problem, we need to understand the role of each component in a full wave rectifier circuit.$\\$A full wave rectifier circuit typically consists of the following components:$\\$• A centre-tapped transformer$\\$• Two p-n junction diodes$\\$• A capacitor$\\$• A load resistance$\\$Let's analyze the function of each component:$\\$• A centre-tapped transformer:$\\$ - This component is used to step down or step up the input AC voltage and provide two equal voltages with opposite phases.$\\$ - It does not remove AC ripple.$\\$• p-n junction diodes:$\\$ - These diodes are used to convert AC voltage into pulsating DC voltage by allowing current to flow in one direction only.$\\$ - They do not remove AC ripple; they only rectify the AC signal.$\\$• Capacitor:$\\$ - The capacitor is used to smooth out the pulsating DC output from the diodes.$\\$ - It charges during the peak voltage and discharges when the voltage drops, thereby reducing the ripple voltage.$\\$ - This component is responsible for removing the AC ripple from the rectified output.$\\$• Load resistance:$\\$ - The load resistance is where the rectified and smoothed DC voltage is applied.$\\$ - It does not play a role in removing AC ripple.$\\$Therefore, the component that removes the AC ripple from the rectified output is the capacitor.$\\$The correct option is Option 3: Capacitor.