Which of the following is a symptom of a stopped heart?

The correct answer signifies a critical state in which the heart has ceased functioning. When a heart stops beating, it leads to an immediate and total cessation of blood circulation, which effectively results in organ failure and a complete shutdown of bodily functions. The body can no longer deliver oxygen to tissues and organs, leading to a lack of symptoms aside from the obvious signs of clinical death.

While a stopped heart can lead to symptoms such as blue lips or cool and moist skin due to lack of oxygen and blood circulation, the statement that there are "no symptoms, complete body shut down" accurately captures the essence of what occurs in this dire situation. This aligns with the reality that in cases of cardiac arrest, individuals can exhibit no voluntary movement or response, and their bodily systems are critically impaired, leading to rapid progression to unconsciousness and eventually death without intervention. Thus, the state of "complete body shut down" is a hallmark of this condition.