Which Muslim invader conquered Bengal during the time of Lakshmana Sena?

1. Muhammad Ghori
2. Bakhtiyar Khilji
3. Qutb-ud-Din Aibak
4. Iltutmish

Answer: Bakhtiyar Khilji

Explanation: In 1203 CE, during the reign of Lakshmana Sena, Bengal faced the conquest of Muhammad Bakhtiyar Khijli, a Muslim invader.