The correct answer is: d) All of the above.
Meghalaya’s hilly terrain poses a challenge for road construction and maintenance, air travel, and water transport.
Road construction and maintenance in Meghalaya is difficult and expensive due to the steep slopes and the presence of many rivers and streams. The roads are often narrow and winding, and they are prone to landslides and flooding.
Air travel in Meghalaya is also challenging due to the mountainous terrain. The airports are located in valleys, and the runways are short. This makes it difficult for large aircraft to land and take off.
Water transport is also difficult in Meghalaya due to the many rapids and waterfalls. The rivers are not navigable for long distances, and they are often blocked by landslides.
As a result of these challenges, Meghalaya is one of the most difficult states in India to access. This has made it difficult for the state to develop economically.