Correct option is C
The part that contains the error in the sentence is
(c) after knowing truth.
· The issue here is that the phrase "knowing truth" lacks an article ("the") before "truth," making it grammatically incorrect.
· In English, when referring to a specific truth, it is customary to use the definite article "the."
· Corrected Sentence: "After knowing the truth, the jury took the right decision in the case."