• Open secret – A piece of information that is officially kept secret but is actually known by many.

• An open secret refers to a situation where something is supposed to be confidential, yet almost everyone is aware of it.

• It describes circumstances in which secrecy is maintained in form, but the information is widely known in practice.

• Oxymoron:

• A figure of speech in which two contradictory words are combined to express a single concept.

• Oxymorons often reveal a hidden truth through the juxtaposition of opposing terms.

• Difference between Paradox and Oxymoron: A paradox may involve entire sentences or statements, whereas an oxymoron only combines two contradictory words.

• Famous Example:

“All changed, changed utterly:
A terrible beauty is born.”
(W. B. Yeats: "Easter 1916")

• Why the other options are not Oxymorons:

• Studious Student – Just a descriptive phrase; no contradiction.

• Brilliant Student – Positive adjective + noun; no conflict.

• Bright Sun – Literal description; no opposition present.