A. Reversion
B. Deletion
C. Contraction
D. Progression

Explanation:

The word atavism means returning to an earlier or primitive state or trait (a backward step in evolution or development).

In simple words: going back to old or earlier conditions.

The opposite of atavism is progression, which means moving forward, development, or advancement.

So, Progression is the correct antonym of Atavism.

Real-Life Example

• A society going back to old customs → atavism
• A society improving and developing → progression

Backward movement = Atavism
Forward movement = Progression

Main Points for Exams

• Atavism means returning to primitive or earlier traits.
• Progression means development or advancement.
• Other options are unrelated or similar in meaning.
• Therefore, Progression is the correct antonym of Atavism.
• This type of vocabulary question is common in PPSC, FPSC, CSS, PMS, NTS, IELTS, TOEFL, and other competitive exams.

Quick Memory Trick

⏪ Atavism = Backward Step
⏩ Progression = Forward Step

Backward ↔ Forward
Atavism ↔ Progression ✔️