The correct answer is (c) Uttar Pradesh.
Uttar Pradesh is the most populous state in India, with a population of 200.3 million in 2011. It is also the most densely populated state, with a population density of 828 people per square kilometer.
West Bengal is the second most populous state, with a population of 91.3 million in 2011. It has a population density of 1028 people per square kilometer.
Bihar is the third most populous state, with a population of 83.3 million in 2011. It has a population density of 1102 people per square kilometer.
Punjab is the fifth most populous state, with a population of 27.7 million in 2011. It has a population density of 551 people per square kilometer.
The population of Uttar Pradesh has been growing rapidly in recent years. In 1951, the population of Uttar Pradesh was 60.3 million. By 2011, the population had more than tripled to 200.3 million. This rapid growth is due to a number of factors, including high birth rates, low death rates, and migration from other parts of India.
The high population density of Uttar Pradesh has a number of implications for the state. One implication is that the state faces a challenge in providing basic services such as education, healthcare, and sanitation to its large population. Another implication is that the state is vulnerable to environmental degradation, as the high population density puts a strain on natural resources such as water and land.
The government of Uttar Pradesh has taken a number of steps to address the challenges posed by the high population density. These steps include investing in education and healthcare, promoting family planning, and developing infrastructure. The government is also working to improve the environment and protect natural resources.