A. Detriment
B. Lessening
C. Pervert
D. None of these

Explanation:

The word addendum means something added, especially an extra part added to a book, document, or report.

In simple words: an addition or extra information.

So, the opposite of addendum should be something like removal, subtraction, or deletion.

But none of the given options correctly match that meaning.

So, the correct answer is None of these.

Real-Life Example

Imagine a report:

• A teacher adds extra pages at the end of a report → this is an addendum.
• If pages are removed or information is reduced → that would be the opposite.

Addition = Addendum
Removal = Opposite (not given here)

Main Points for Exams

• An addendum means an extra addition to a document.
• Its antonym should be subtraction or deletion.
• Detriment, Lessening, and Pervert are not correct opposites.
• Therefore, None of these is the correct answer.
• This type of question is common in PPSC, FPSC, CSS, PMS, NTS, IELTS, TOEFL, and other competitive exams.

Quick Memory Trick

➕ Addendum = Addition
➖ Opposite = Removal (not given here)

Add ↔ Remove
Addendum ↔ None of these ✔️