Option a is the correct answer Krishnadevaraya (17 January 1471 - 17 October 1529) was a emperor of the Vijayanagara Empire reigning from 1509 to 1529. He was the third monarch of the Tuluva dynasty, and is considered to be one of the greatest rulers in Indian history. Qutb Minar, commissioned by Qutb ud din Aibak in 1206, was finished in 1230 by his successor Iltutmish after Aibak's demise during its construction. The first Portuguese to land in India was Vasco De Gama in 1498. Firuz Shah Tughluq, the third ruler of the Tughluq dynasty, died on February 20, 1388. He was born in 1309, and his reign lasted from 1351 to 1388.