The correct answer is (d), Qutub-ud-din Aibak.
Qutub-ud-din Aibak was the founder of the Mamluk dynasty in Delhi. He was a slave of Muhammad Ghori, who conquered Delhi in 1192. After Ghori’s death in 1206, Aibak became the Sultan of Delhi.
In 1200, Aibak conquered the town of Meerut, which was located near the ancient city of Indraprastha. In Meerut, he found a pillar that was inscribed with the name of Ashoka, the Mauryan emperor who ruled India from 272 to 232 BCE. Aibak brought the pillar back to Delhi and erected it in the Qutub Minar complex.
The Ashoka Pillar is a 24-meter-tall stone pillar that is made of polished sandstone. It is one of the most important historical monuments in India. The pillar is inscribed with edicts of Ashoka, which are decrees that he issued to promote Buddhist values.
The Ashoka Pillar is a symbol of the Mauryan Empire and its legacy. It is also a reminder of the early history of Delhi.
The other options are incorrect.
(a) Firozshah Tughlaq was the sixth Sultan of Delhi. He ruled from 1351 to 1388. He did not bring the Ashoka Pillar to Delhi.
(b) Jalaluddin Khilji was the second Sultan of Delhi. He ruled from 1290 to 1296. He did not bring the Ashoka Pillar to Delhi.
(c) Mohammad-bin-Tughlaq was the fifth Sultan of Delhi. He ruled from 1325 to 1351. He did not bring the Ashoka Pillar to Delhi.