Gradual recovery from illness

A. Hysteria

B. Amnesia

C. Superannuation

D. Convalescence

Answer: Option D

Solution(By Examveda Team)

One word substitute is Convalescence.

Hysteria: exaggerated or uncontrollable emotion or excitement.
Amnesia: a partial or total loss of memory.
Superannuation: regular payment made into a fund by an employee towards a future pension.
Convalescence: time spent recovering from an illness or medical treatment; recuperation.