The correct answer is option 4, Delhi. Delhi is the western-most city among the given options.
Option 1, Jhansi, is located in the central part of India, not towards the western side.
Option 2, Gwalior, is also located in the central part of India and is not towards the western side.
Option 3, Agra, is situated more towards the northern part of India, rather than the western side.
On the other hand, Delhi is located in the northern part of India but is more towards the west as compared to the other options. Delhi is a major city and the capital city of India. It is situated on the western bank of the Yamuna River and is known for its historical and cultural significance.