A. recondite
B. intricate
C. obscure
D. artful

Explanation:

The word abstruse means difficult to understand; not clear; hard to comprehend.

In simple words: something that is very complex or not easily understood.

So, the synonym of abstruse is obscure.

Real-Life Example

• The topic of quantum physics is very abstruse.
• The topic is very obscure and hard to understand.

Hard to understand = Abstruse

Main Points for Exams

• Abstruse means hard to understand.
• Obscure is its correct and most common synonym.
• Other options are either partial or unrelated meanings.
• Therefore, Obscure is the correct answer.
• Common in PPSC, FPSC, CSS, PMS, NTS, IELTS, TOEFL exams.

Quick Memory Trick

🧠 Abstruse = Hard to Understand
🌫️ Obscure = Same Meaning

Clear ↔ Abstruse
Abstruse ↔ Obscure ✔️