Vocabulary—Antonyms MCQ: Select the option most nearly opposite in meaning to ‘‘DOUBTFUL’’; contrast uncertainty, hesitation, and suspicion with certainty and confidence.

Given data

• Word: doubtful = uncertain; questionable.
• Options: Famous, Certain, Fixed, Important

Concept/Approach
Antonym should provide assuredness and clarity: certain.

Option-by-option analysis
Famous/Important: social status or significance, not the opposite of uncertainty. ❌Fixed: unchanging, not necessarily certain in knowledge. ❌Certain: sure, confident—direct antonym. ✅

Example
The outcome is doubtful ↔ the outcome is certain.

Final Answer
Certain