Who among the following was the first Muslim military commander who annexed Bihar and Bengal by overth-rowing the Sena dynasty ?

Muhammad bin Bakhtiyar Khalji was a Turko-Afghan military general who served under the Ghurid dynasty and later assisted Qutb-ud-din Aibak [2][t1]. In the early 13th century (c. 1200–1205), he led the first Muslim military expeditions into eastern India, successfully annexing Bihar and Bengal [t2][t9]. His campaign in Bengal targeted the Sena dynasty, specifically the capital Nabadwip, forcing the elderly ruler Lakshmana Sena to retreat to southeastern Bengal [t2]. This conquest established the first Muslim kingdom in the region with its capital at Lakhnauti [t2]. Other options are historically incorrect for this period: Mahmud Gawan was a 15th-century Bahmani minister [t3], the Adil Shahis ruled Bijapur in the 15th-16th centuries [t10], and Shams-ud-din Iltutmish was a later Sultan of Delhi who focused on consolidating the empire and suppressing internal rebellions [c4].

Sources

1. [2] https://en.wikipedia.org/wiki/Muhammad_Bakhtiyar_Khalji