In Draviḍa temple architecture, what is the central spire or tower directly above the sanctum sanctorum (garbhagriha) called?

With reference to Indian history and art traditions, consider the following statements: I. The Indo-Islamic architectural style under the Delhi Sultanate was characterised by extensive use of arcuate construction techniques, completely replacing earlier trabeate traditions. II. The Vijayanagara school of painting developed primarily as mural art on temple walls, with themes drawn from epics and Puranas. III. The Natyashastra, attributed to Bharata Muni, deals exclusively with dramaturgy and does not encompass music and dance traditions. IV. The Mughal school of painting reached a stage of refinement under Jahangir, marked by increased naturalism and detailed portraiture. V. The Nagara style of temple architecture is generally associated with curvilinear shikharas and is predominantly found in northern India. Which of the statements given above are NOT correct?

In which art style was the earliest human anthropomorphic image of Gautama Buddha crafted?