A. Common
B. Social
C. Dull
D. Ancient

Explanation:

The word singular can mean unique, unusual, exceptional, or one of a kind.

In simple vocabulary questions, singular is often used in the sense of unique or uncommon.

The opposite of singular is common, which means ordinary, usual, or frequently found.

So, Common is the correct antonym of Singular.

Real-Life Example

• A rare diamond with unique features → singular
• An ordinary stone found everywhere → common

Unique = Singular
Ordinary = Common

Main Points for Exams

• Singular means unique, exceptional, or one of a kind.
• Common means ordinary or widespread.
• Other options are unrelated.
• Therefore, Common is the correct antonym of Singular.

Quick Memory Trick

⭐ Singular = Unique
📋 Common = Ordinary

Unique ↔ Ordinary
Singular ↔ Common ✔️