The verified answer to “Important Battles question: The Battle of Tukaroi (1575) established Mughal control over which region?” is Bengal and Bihar, option B. The source-backed, question-specific record explains: The Battle of Tukaroi (March 3 1575) was fought between Akbar's forces and the forces of Daud Khan Karrani the Sultan of Bengal and Bihar. The Mughals won and Bengal came under Mughal suzerainty leading to the end of the independent Afghan sultanate of 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 Bengal and Bihar and satisfies every condition stated in the question. The remaining choices—Punjab, Rajputana and Deccan—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 Bengal and Bihar 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.