The correct answer is: a) Affordable.
Public transportation in Kerala is generally considered to be affordable. The state government has implemented a number of measures to make public transportation more affordable, including providing subsidies for bus fares and introducing a metro rail system. As a result, public transportation is a viable option for many people in Kerala, and it helps to reduce traffic congestion and pollution.
Option b) Efficient is not always the case. Public transportation in Kerala can be slow and unreliable, especially during peak hours. However, the government is working to improve the efficiency of public transportation, and there have been some improvements in recent years.
Option c) Comfortable is also not always the case. Public transportation in Kerala can be crowded and uncomfortable, especially during peak hours. However, the government is working to improve the comfort of public transportation, and there have been some improvements in recent years.
Overall, public transportation in Kerala is generally considered to be affordable. However, it can be slow, unreliable, and uncomfortable at times. The government is working to improve the efficiency and comfort of public transportation, and there have been some improvements in recent years.