A self-contradictory witty statement is called a/an-

Correct answer: Epigram.

• Epigram:
- A brief and witty statement which is apparently self-contradictory.
- এটি সাধারণত একটি একক ভাবনা বা পর্যবেক্ষণ প্রকাশ করে, যার শেষে চমকপ্রদ সমাপ্তি থাকে।
- It leads the reader to think and discover the meaning of the paradox in a statement.
- It provides the intended pleasure,
- They sometimes offer humor, attack the target subject, and create a lasting impression on the readers.
- Example: 'Our sweetest songs are those that tell the saddest thought.' (Shelly: ''To a Skylark'')

• Other options:
খ) Episode
- A part of a longer story or a larger sequence.
- Though A episode appears complete in itself, it leaves behind some clues on which the next episode is developed.
- An episode contributes to the total design of the story.

গ) Epithet
- Basically, an adjective placed before or after a person or a thing.
- An epithet is used as a substitute for the description of the characteristics of a person or thing.

ঘ) Exposition
- একটি নাটকের সূচনা যা শৈল্পিকভাবে অতীত এবং বর্তমানের কিছু ঘটনাকে উপস্থাপন করে এবং পরবর্তী কী হতে চলেছে সে সম্পর্কে ইঙ্গিত দেয়।
- It builds the background of the plot, introduces the major theme or themes, and characters, locates the story in time and place, and also sets the tone of the play.

Source:
1. Britannica.
2. An ABC of English Literature, Dr. M Mofizar Rahman.