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Drop the right meaning from the below box:
 
Answer variants:
Pearl
Annuity
Clerk
Improvement
 
1.
 \(=\) A hard, lustrous spherical mass, typically white or bluish-grey, formed within the shell of a pearl oyster or other bivalve mollusc and is highly prized as a gem
 
2.
 \(=\) An occasion when something gets better or when you make it better
 
3
 \(=\) A fixed sum of money paid to someone each year, typically for the rest of their life
 
4
 \(=\) A person who works in an office, dealing with records or performing general office duties