The verified answer to “Important Battles question: The Battle of Porto Novo (1781) - which Mysorean commander was defeated by Sir Eyre Coote?” is Hyder Ali, option B. The source-backed, question-specific record explains: The Battle of Porto Novo (July 1 1781) saw the British forces under Sir Eyre Coote defeat Hyder Ali's forces near Porto Novo (Parangipettai) in Tamil Nadu. 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 Hyder Ali and satisfies every condition stated in the question. The remaining choices—Tipu Sultan personally, General Tipu Sultan and Miran Sahib—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 Hyder Ali without relying on option position.