Given these constraint, we have no alternative but to suggest an improvised solution.

A. a complete

B. a preplanned

C. a permanent

D. a proscribed

Answer: Option B

Solution(By Examveda Team)

improvised : created and performed spontaneously or without preparation.
complete : having all the necessary or appropriate parts.
preplanned : plan in advance.
permanent : lasting or intended to last or remain unchanged indefinitely.
proscribed : ban; disallow.


Antonym of improvised is preplanned