Which of the following statement/s are true about the 'Road Sector/Roadways of India'?
- In India, roads are classified into six categories based on their capacity and significance
- National Highways serve as the primary road networks, connecting various extremities of the country.
- State Highways are roads that link a state's capital city with different district headquarters.
- The Border Roads Organisation, a government undertaking established in 1950, focuses on constructing and maintaining roads in the border areas of the country.