Option b is the correct answer. The bronze icons of Nataraja are considered to be the world's greatest iconographical creations because they capture the essence of Hindu philosophy and cosmology in a single image. They also demonstrate the mastery of the Chola sthapatis, or sculptors, who used the lost-wax technique to create intricate and realistic figures with perfect proportions and expressions. The Chola sthapatis were patronized by the Chola kings, who ruled over southern India and Sri Lanka from the 9th to the 13th century C