One who is honourably discharged from service

A. Retired

B. Emeritus

C. Relieved

D. Emancipated

Answer: Option B

Solution(By Examveda Team)

One word substitute is Emeritus.

Retired: having left one's job and ceased to work.
Emeritus: (of the former holder of an office, especially a university professor) having retired but allowed to retain their title as an honour.
Relieved: no longer feeling distressed or anxious.
Emancipated: free from legal, social, or political restrictions.