Correct option is C
The correct substitution of the highlighted words is "than you knows."
· The correct phrase to use in this context is "than you knows." The original sentence, "None other beside you are knowing the truth," is grammatically incorrect.
· The phrase "None other" typically pairs with "than" in English grammar, not "beside." Additionally, the verb "knows" should be used instead of "are knowing" to match the singular subject "None other."
· Thus, the correct substitution is option (c) "than you knows," making the sentence read: "None other than you knows the truth."