Study the following table carefully and answer the questions that follow :
India Road Network 2016
| Serial No. | Road Category | Length in km |
|---|---|---|
| 1. | National Highways | 101011 |
| 2. | State Highways | 176166 |
| 3. | Major District Roads | 561940 |
| 4. | Rural Roads | 3935377 |
| Total | 4774494 |
National highways are less by how many km with respect to state highways in 2016 ?
Major district roads are more by how many km with respect to state highways in 2016 ?
Why does a very large length of roads come under rural roads category ?