The correct answer is: c) Ropeways.
Ropeways are the primary mode of transportation within Arunachal Pradesh, especially in hilly areas. This is because they are the most efficient and cost-effective way to transport people and goods over long distances in mountainous terrain.
Railways are not a viable option in Arunachal Pradesh because the terrain is too hilly and mountainous. Buses are also not a good option because they are slow and can be dangerous on winding mountain roads. Waterways are also not a good option because there are not many rivers or lakes in Arunachal Pradesh.
Ropeways are a safe and efficient way to transport people and goods over long distances in mountainous terrain. They are also relatively inexpensive to build and operate. As a result, they are the most popular mode of transportation in Arunachal Pradesh.
Here are some additional details about each option:
- Railways: Railways are a type of transportation system that uses trains to transport people and goods. They are the most common mode of transportation in many countries, but they are not a viable option in Arunachal Pradesh because the terrain is too hilly and mountainous.
- Buses: Buses are a type of transportation system that uses buses to transport people. They are a common mode of transportation in many countries, but they are not a good option in Arunachal Pradesh because they are slow and can be dangerous on winding mountain roads.
- Ropeways: Ropeways are a type of transportation system that uses cables to transport people and goods. They are a common mode of transportation in mountainous areas, and they are the most popular mode of transportation in Arunachal Pradesh.
- Waterways: Waterways are a type of transportation system that uses rivers, lakes, and oceans to transport people and goods. They are a common mode of transportation in many countries, but they are not a good option in Arunachal Pradesh because there are not many rivers or lakes in the state.