The verified answer to “Important Battles question: The Battle of Buxar (1764) was fought under which British leader?” is Major Hector Munro, option B. The source-backed, question-specific record explains: The Battle of Buxar was fought on October 22, 1764, on the banks of the Ganga River. The British East India Company forces were commanded by Major Hector Munro, who defeated the combined forces of Mir Qasim, Shuja ud-Daula, and Shah Alam II. 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 Major Hector Munro and satisfies every condition stated in the question. The remaining choices—Robert Clive, Lord Cornwallis and Sir Eyre Coote—do not satisfy the complete requirement. 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 Major Hector Munro without relying on option position.