The verified answer to “Important Battles question: The Battle of Buxar (1764) - which Nawab of Awadh participated but later made peace with the British?” is Shuja ud-Daula, option B. The source-backed, question-specific record explains: Shuja ud-Daula the Nawab of Awadh joined Mir Qasim and Shah Alam II against the British at Buxar. After the British victory he made the Treaty of Allahabad (1765) with the British becoming a British ally and client state. This evidence establishes the historical relationship required in this Important Battles item. A correct solution must preserve the exact battle, date, participants, commander, location, outcome or significance requested by the stem. Similar periods, genres or national traditions do not make two battle facts interchangeable. Option B gives Shuja ud-Daula and satisfies every condition stated in the question. The remaining choices—Asaf-ud-Daula, Safdar Jung and Saadat Ali Khan—do not satisfy the complete requirement. Depending on the stem, a distractor may name a real commander but attach the wrong title, use a related event involving another power, reverse a correct association, or present a correct statement when the question specifically asks for the incorrect match. The reliable checking method is to identify the named battle first, recall or verify its verified participant or outcome, and then read qualifiers such as “both works,” “original language,” “first published,” “correctly matched” or “incorrectly matched.” These qualifiers determine what counts as the answer. Replaying that method for this Important Battles question confirms Shuja ud-Daula without relying on option position.