Directions: Choose the pair(s) of words that need to be interchanged to make…

CONCEPT: In word-interchange (sentence-improvement) questions, the sentence already contains all the right words, but two of them sit in swapped positions, breaking a fixed collocation or idiom. The correct fix restores that exact phrase by exchanging only the two mis-ordered words, without disturbing anything else in the sentence.

APPLICATION: Reading the given sentence as printed: "The judiciary (A) must respect the powers (B) of separation (C) between organs of the state.(D)" The phrase "the powers of separation" is not a standard English collocation. The well-established constitutional idiom is "separation of powers" -- the doctrine that the legislative, executive, and judicial organs of the state operate within their own separate spheres. Exchanging only the words marked B (powers) and C (separation) gives: "The judiciary must respect the separation of powers between organs of the state." This restores the fixed phrase "separation of powers," and the sentence becomes grammatically correct and meaningful, while judiciary (A) and state (D) remain correctly placed as the subject and as the object of "organs of."

CROSS-CHECK: Testing the other listed swaps confirms this is the only fix that works:

• Exchanging A and D alone: "The state must respect the powers of separation between organs of the judiciary." "The powers of separation" is still not a standard English collocation, so this exchange leaves the sentence's actual wording error uncorrected.

• Exchanging A and B alone: "The powers must respect the judiciary of separation between organs of the state." This changes the sentence's subject and creates the meaningless phrase "judiciary of separation," leaving the core wording problem untouched.

• Exchanging B-C together with A-D: "The state must respect the separation of powers between organs of the judiciary." This restores "separation of powers," but it also needlessly relocates the sentence's subject and object -- the doctrine concerns organs of the state, not organs "of the judiciary" -- so this over-corrects the sentence.

• Leaving the sentence unchanged: "the powers of separation" remains a non-standard collocation, so the sentence is still not grammatically sound.

Result: Only exchanging B and C, and nothing else, produces a sentence that is both grammatically standard and logically sound.