The verified answer to “Important Battles question: The Battle of Saragarhi (1897) involved soldiers from which regiment defending against Afghan tribesmen?” is 36th Sikh Infantry (4th Battalion Sikh Regiment), option B. The source-backed, question-specific record explains: The Battle of Saragarhi (September 12 1897) was a last-stand battle where 21 Sikh soldiers of the 36th Sikh Infantry under Havildar Ishar Singh defended a small outpost against an attack of 10,000-12,000 Afghan tribesmen. All 21 soldiers died fighting. 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 36th Sikh Infantry (4th Battalion Sikh Regiment) and satisfies every condition stated in the question. The remaining choices—1st Punjab Infantry, Gurkha Rifles and Bengal Lancers—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 36th Sikh Infantry (4th Battalion Sikh Regiment) without relying on option position.