Pace maker is related with

The correct answer is D. Heart.

A pacemaker is a small device that is implanted in the chest to help control the heart rate. It is usually used to treat people with slow heart rates. The pacemaker sends electrical signals to the heart, telling it to beat at a normal rate.

The other options are incorrect because they are not organs that are directly related to the heart. The kidney is an organ that filters waste products from the blood. The brain is the organ that controls all of the body’s functions. The lung is an organ that takes in oxygen and releases carbon dioxide.