Delhi!

Delhi authoritatively the National Capital Territory of Delhi (NCT), is a city and a union region of India. It is circumscribed by Haryana on three sides and by Uttar Pradesh toward the east. The NCT covers a territory of 1,484 square kilometers (573 sq mi). As per 2011 registration, Delhi city's legitimate populace was more than 11 million, the second most astounding in India after Mumbai, while the entire NCT's populace was around 16.8 million. Delhi's urban zone is currently considered to stretch out past the NCT limit to incorporate an expected populace of more than 26 million individuals, making it the world's second-biggest urban territory.

Thus, it ranked 31st in the list of its area rank…

Cheers!