The correct answer is (d) Uttar Pradesh.
Uttar Pradesh is the most populous state in India, with a population of 200,396,921 as per the 2011 census. It is located in the northern part of the country and shares borders with Nepal, Uttarakhand, Himachal Pradesh, Haryana, Rajasthan, Madhya Pradesh, Chhattisgarh, and Bihar. The capital of Uttar Pradesh is Lucknow.
The state is home to a diverse range of cultures and languages. The official language of Uttar Pradesh is Hindi, but there are many other languages spoken in the state, including Urdu, Punjabi, Bengali, and Marathi.
Uttar Pradesh is a major agricultural state, and its economy is based on agriculture, manufacturing, and services. The state is home to many important historical and cultural sites, including the Taj Mahal, Agra Fort, and Fatehpur Sikri.
The other options are incorrect because they are not the most populous states in India. Madhya Pradesh is the second most populous state, with a population of 72,693,945. Andhra Pradesh is the third most populous state, with a population of 84,665,028. Odisha is the fifth most populous state, with a population of 41,947,356.