Explanations:Qutubuddin Aibak, also known as Qutb-ud-din Aibak, was the founder of the Delhi Sultanate and the first Sultan of Delhi. He was a slave of Muhammad Ghori and later became his general. After Muhammad Ghori's death, Aibak took control of the territories in India and established the Delhi Sultanate, marking the beginning of Muslim rule in the subcontinent.
One of the significant conquests attributed to Qutubuddin Aibak was the capture of Ajmer. Ajmer was an important city in the region, and its capture was crucial for consolidating his power and establishing the Delhi Sultanate. Ajmer was a strategic location due to its geographical position and its significance in the political landscape of the time.
Qutubuddin Aibak's conquests were primarily focused on the Delhi region and its surroundings. He aimed to establish a strong base of power in the region, and Ajmer was a key part of this strategy. The capture of Ajmer helped him to control the surrounding areas and to establish a stable foundation for the Delhi Sultanate.
While Qutubuddin Aibak had some influence in other regions such as Gujarat, these were not major conquests attributed to him. His primary focus was on establishing control over the Delhi region and its immediate surroundings. Therefore, among the given options, Ajmer is the correct answer as it was a significant conquest of Qutubuddin Aibak.