Introduction:
Ibn Battuta was a Moroccan explorer who traveled extensively across Africa, the Middle East, and Asia during the 14th century. He left behind a detailed account of his travels known as the "Rihla." In this account, he described various cities he visited, including the largest city in India.

Answer:
The city that Ibn Battuta described as the largest in India is Delhi.

Explanation:
Ibn Battuta's Travels in India:
Ibn Battuta arrived in India in 1333 and spent around eight years exploring the various regions of the country. During his travels, he visited several cities, including Delhi, Mumbai (then known as Bombay), Bangalore, and Chennai (then known as Madras).

Description of Delhi:
In his account, Ibn Battuta described Delhi as the largest city in India. He marveled at its grandeur, impressive architecture, and bustling markets. He noted that Delhi was the center of political power and an important trading hub.

Delhi's Significance:
During the 14th century, Delhi was indeed one of the most important cities in India. It served as the capital of the Delhi Sultanate, a Muslim empire that ruled over large parts of the Indian subcontinent. The city's strategic location, prosperous trade, and cultural richness made it a thriving metropolis.

Legacy of Delhi:
Delhi has a rich historical and cultural legacy that can still be experienced today. It has been the capital of several empires and dynasties, including the Mughals and the British. The city is home to numerous architectural wonders, such as the Red Fort, Jama Masjid, Qutub Minar, and Humayun's Tomb, which are a testament to its glorious past.

Conclusion:
In his travel account, Ibn Battuta described Delhi as the largest city in India during the 14th century. Delhi's significance as a political and commercial center, as well as its architectural splendor, made it a prominent city in the region. Today, Delhi continues to be a major city in India, bustling with history, culture, and modernity.