He is well known for coming up with impracticable solutions.

A. easy

B. possible

C. feasible

D. alternate

Answer: Option C

Solution(By Examveda Team)

impracticable : (of a course of action) impossible in practice to do or carry out.
easy : achieved without great effort.
possible : able to be done or achieved.
feasible: possible to do easily or conveniently.
alternate : occur in turn repeatedly.


Antonym of impracticable is feasible