What is ‘Pseudonym’ in letter writing?

Correct option is C

A "Pseudonym" in letter writing refers to a fictitious name used by an author instead of their real, legal name. It is often employed for reasons of anonymity, privacy, or to separate one's personal life from their professional or public work. Using a pseudonym allows writers to publish without having their real identity directly associated with their work.
• Meanings of all options:
o Name of the Editor: The actual name of the person who edits the content, not a fictitious one.
o Legal name: The name registered at birth or officially recognized by law, not a fictitious or assumed identity.
o Real name: The person’s actual name, as opposed to a pseudonym or fictitious one.