Find the part of the sentence that contains an error: What makes the draft legislation especially contentious is not its proposed restructuring of fiscal authority perse, (1)/ but that it assumes, without empirical evidence, (2)/ a fiscal parity among states whose developmental starting points are (3)/ incomparable by any accepted standard. (4)

Option (b) contains an error. The structure “not X, but Y” demands parallelism (same grammatical form on both sides). · In part (1), X is a noun phrase: “its proposed restructuring of fiscal authority…” · In part (2), Y begins as a that-clause: “that it assumes…” · This mismatch (noun phrase ≠ clause) breaks parallel structure. Corrected versions could be: · “… not its proposed restructuring of fiscal authority per se, but its assumption, without empirical evidence, of a fiscal parity …” · OR · “… not that it restructures fiscal authority, but that it assumes …” Grammatical rule applied: In correlative pairs like not…but / not only…but also, the connected elements must be parallel in form (noun↔noun, clause↔clause, gerund↔gerund). Why other parts are correct: · (1) Proper noun phrase as the first element. · (3) “whose developmental starting points are…” is a correct relative clause. · (4) “incomparable by any accepted standard” completes the idea logically and grammatically.