The correct answer is: b) Kolasib
Kolasib is a district in the state of Mizoram, India. It is located in the southern part of the state and is bordered by the states of Assam and Tripura to the north, the district of Aizawl to the east, and the districts of Lawngtlai and Serchhip to the south. The district has a population of about 170,000 people and its headquarters is the town of Kolasib.
The road infrastructure in Kolasib is the least developed in Mizoram. The district has a total road length of about 200 kilometers, of which only about 50 kilometers are paved. The remaining roads are unpaved and are in poor condition. This makes it difficult for people to travel within the district and to access essential services.
The poor road infrastructure in Kolasib is due to a number of factors. One factor is the mountainous terrain of the district. The mountains make it difficult to build roads and to maintain them. Another factor is the lack of funding for road construction and maintenance. The government of Mizoram does not have enough money to build and maintain roads in all of the districts of the state.
The poor road infrastructure in Kolasib has a number of negative consequences. One consequence is that it makes it difficult for people to travel within the district. This can make it difficult for people to get to work, to school, and to get medical care. Another consequence is that it makes it difficult for businesses to operate in the district. This is because businesses need good roads to transport goods and services.
The government of Mizoram is aware of the problems with the road infrastructure in Kolasib. The government has plans to improve the road infrastructure in the district. However, it is not clear when these plans will be implemented.