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Drop the right meaning from the below box:
 
Answer variants:
Dugout
Artillery
Carol
Sniper
 
1.
 \(=\) A shelter, usually for soldiers, made by digging a hole in the ground and covering it
 
2.
 \(=\) A religious folk song or famous hymn, particularly one associated with Christmas
 
3. 
 \(=\) Very large guns that are moved on wheels or metal tracks, or the part of the army that uses these
 
4. 
 \(=\) A person who shoots from a hiding place, especially accurately and at long range