'Very few metals in the world are as costly as gold.'
Select the correct comparative degree of the above sentence.

The correct answer is Option A (Gold is costlier than most other metals in the world.).

Key Points:
• Concept: Transformation of Degrees of Comparison.
• Positive starting with 'Very few...': Very few + plural noun + as...as
• Comparative conversion formula: Subject + verb + Comparative degree + than most other + plural noun
• Explanation:
• Positive: Very few metals in the world are as costly as gold.
• Comparative: Gold is costlier than most other metals in the world.
• Other Options:
• Option 2 is Superlative Degree ('one of the costliest...').
• Option 3 changes the meaning entirely.
• Option 4 contains double comparative error ('more costlier').
• Official Key: Option 1 is the officially declared answer.
• Key Takeaway: Remember: 'Very few...' in Positive Degree transforms into '...costlier than most other...' in Comparative Degree.