The correct answer is C. Kerala.
Kerala has a well-functioning public health system that has been praised by many experts. The state has a high literacy rate, a strong focus on preventive care, and a well-trained workforce. As a result, Kerala has some of the best health outcomes in India, including low infant mortality rates and high life expectancy.
Maharashtra has a large population and a diverse economy. The state has made significant investments in public health in recent years, but it still faces challenges such as high rates of malnutrition and communicable diseases.
Gujarat is a relatively prosperous state with a strong economy. The state has made some progress in improving public health, but it still faces challenges such as high rates of maternal and child mortality.
Bihar is a poor state with a high rate of poverty. The state has made some progress in improving public health, but it still faces significant challenges such as high rates of malnutrition and communicable diseases.
In conclusion, Kerala has the best public health system in India. The state has a high literacy rate, a strong focus on preventive care, and a well-trained workforce. As a result, Kerala has some of the best health outcomes in India, including low infant mortality rates and high life expectancy.