The correct answer is option 4, Bijapur. Gol Gumbaz, the largest dome in the world, is situated in Bijapur, a city in the Indian state of Karnataka. It was built by the Adil Shahi dynasty in the 17th century as a mausoleum for Sultan Mohammad Adil Shah. The Gol Gumbaz is known for its massive dome, which has a diameter of 44 meters and stands at a height of 51 meters. The dome is supported by eight intersecting arches, giving it a unique architectural design. Inside the mausoleum, there is the tomb of Sultan Mohammad Adil Shah, along with the tombs of his wives and other family members. The monument is a popular tourist attraction and a significant historical landmark in India.