This example renders a choropleth map of India using a Mercator projection, with each state filled by a categorical color scale. The visualization loads GeoJSON data from a TopoJSON file hosted on GitHub, then applies `d3.geoPath` to draw the state boundaries as SVG paths. The code uses `d3.zoom` and `d3.event` for interactivity, and `d3.scaleOrdinal` with `d3.schemeCategory10` for coloring. The map includes a static title and uses `d3.geoMercator` with manual translation and scale settings.