In which state is Gol Gumbaz, the tomb of Adil Shah, situated?

The correct answer is A, Karnataka. The Gol Gumbaz stands at Bijapur, now called Vijayapura, in Karnataka. It is the tomb of Muhammad Adil Shah of the Adil Shahi dynasty of Bijapur and was completed in the middle of the seventeenth century. Its dome is one of the largest masonry domes in the world and rests on interlocking arches without any supporting pillars inside, leaving a single vast chamber. The gallery running around the base of the dome is famous as the whispering gallery, where a low sound is repeated several times.

Option B, Tamil Nadu, is the land of Dravida temple building, not of the Deccan sultanates. Option C, Kerala, has its own timber and tiled roof tradition. Option D, Telangana, does hold Qutb Shahi work such as the Charminar and the Golconda fort, but the Adil Shahi capital was Bijapur in Karnataka, so D is the trap option here.