The correct answer is D. melancholy.
Melancholy is a feeling of sadness or gloom. It is often associated with a loss of interest in activities that were once enjoyable, and a feeling of emptiness or hopelessness. Melancholy can be caused by a variety of factors, including stress, grief, and medical conditions.
Anger is a feeling of intense displeasure or hostility. It is often accompanied by a desire to harm or punish the person or thing that caused the anger. Anxiety is a feeling of worry or unease about the future. It is often accompanied by physical symptoms such as a racing heart, sweating, and difficulty breathing. Weariness is a feeling of tiredness or fatigue. It is often accompanied by a lack of motivation or interest in activities.
In the given question, Gaurav is experiencing a pervasive sense of ennui, which is a feeling of boredom or listlessness. This is consistent with the definition of melancholy, as Gaurav is experiencing a loss of interest in activities that were once enjoyable. The other options are not as consistent with the given information.