Antonym of EXTENSION

Answer: Option A

Extension : a part that is added to something to enlarge or prolong it.
Condensation : fusion of parts to reduce the size.
Subtraction : the process or skill of taking one number or amount away from another.
Deletion : the removal or obliteration of written or printed matter, especially by drawing a line through it.
Weakening : make or become weaker in power, resolve, or physical strength.

Antonym of Extension is Condensation