The verified answer to “Important Battles question: The Siege of Sinhagad (1670) was a famous night operation by which Maratha commander?” is Tanaji Malusare, option B. The source-backed, question-specific record explains: The Siege of Sinhagad (February 4 1670) was led by Tanaji Malusare a commander of Shivaji. Using trained monitor lizards ('ghorpad') to scale the cliffs Tanaji's forces captured Sinhagad Fort from the Mughal garrison but Tanaji was killed in the battle. 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. Option B gives Tanaji Malusare and satisfies every condition stated in the question. The remaining choices—Shivaji, Netaji Palkar and Baji Prabhu Deshpande—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. Replaying that method for this Important Battles question confirms Tanaji Malusare without relying on option position.