The engineers subjected the engine to exhaustive tests.  Choose the correct choice from the following answers.
A) Complicated
B) Thorough
C) Exclusive
D) Compulsory
E) Compulsory2
Exhaustive means thorough, complete or in-depth. Hence, option-b is synonym of exhaustive.   Complicatednswer:Complicated
<result>A</result>
The engineers subjected the engine to exhaustive tests.