The correct answer is: IBP is a C-Class station.
A-Class stations are the most important stations in the network. They are typically located in major cities and serve as hubs for regional and intercity travel. B-Class stations are less important than A-Class stations, but they still serve as important transportation hubs for local and regional travel. C-Class stations are the least important stations in the network. They typically serve as local transportation hubs for small towns and rural areas.
IBP is a C-Class station because it is located in a small town and serves as a local transportation hub. It is not a major transportation hub for regional or intercity travel.