The verified answer to “Important Battles question: The Battle of Gagron (1519) resulted in which conquest by Rana Sanga?” is Defeat of Mahmud Khilji II and capture of Malwa territories, option B. The source-backed, question-specific record explains: The Battle of Gagron (1519) saw Rana Sanga defeat Mahmud Khilji II of the Malwa Sultanate and capture significant territory. This extended Mewar's power to include parts of Malwa and made Rana Sanga the dominant power in northwestern India. 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 Defeat of Mahmud Khilji II and capture of Malwa territories and satisfies every condition stated in the question. The remaining choices—Capture of Chanderi, Defeat of Ibrahim Lodi and Conquest of Delhi—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 Defeat of Mahmud Khilji II and capture of Malwa territories without relying on option position. This approach builds accurate historical knowledge and careful option elimination for SSC, Railway, Banking, Defence, State and other competitive examinations.