Which of the following is a polar aprotic solvent? 
Definitions:
Heart and Lung
Vital organs in the human body where the heart pumps blood through the blood vessels and the lungs facilitate the exchange of oxygen and carbon dioxide.
Physical and Emotional Exhaustion
A state of being extremely tired both in body and mind, often as a result of prolonged stress or overwork.
Work-related Stress
Tension or anxiety resulting from job demands, workplace environment, or work-life balance challenges, affecting mental and physical health.
Self-efficacy
A person's belief in their ability to succeed in specific situations or accomplish a task, which can play a significant role in how one approaches goals, tasks, and challenges.
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