Correct Answer & Explanation
Option D
• 'Fatigue' refers to extreme tiredness or weariness resulting from mental or physical exertion or illness.
• 'Exhaustion' means a state of extreme physical or mental tiredness, making it the correct synonym.
• Options A, B, and C ('Vitality', 'Refreshment', 'Agility') denote states of energy, alertness, or physical quickness.