Important Battles question: Who defeated Humayun in the Battle of Chausa (1539)?

The verified answer to “Important Battles question: Who defeated Humayun in the Battle of Chausa (1539)?” is Sher Shah Suri, option B. The source-backed, question-specific record explains: Sher Shah Suri defeated Humayun in the Battle of Chausa fought on June 26, 1539. This was a major setback for Humayun and helped Sher Shah establish his power in Bihar and Bengal. 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 Sher Shah Suri and satisfies every condition stated in the question. The remaining choices—Bahadur Shah of Gujarat, Rana Pratap and Muhammad Shah—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 Sher Shah Suri without relying on option position.