A pervading sense of ennui grips Gaurav.

Answer: Option C

Anger : a strong feeling of annoyance, displeasure, or hostility.
Anxiety : a feeling of worry, nervousness, or unease about something with an uncertain outcome.
Weariness : extreme tiredness; fatigue.
Melancholy : a feeling of pensive sadness, typically with no obvious cause.
Ennui : a feeling of listlessness and dissatisfaction arising from a lack of occupation or excitement.

Synonym of Ennui is Weariness