Introduction:
The correct answer is option 'D', Ibn Batuta. Ibn Batuta, a Moroccan scholar and explorer, traveled to Kerala a little less than seven hundred years ago. He embarked on a remarkable journey that spanned several decades and covered vast distances, making him one of the most renowned travelers in history.

Ibn Batuta's Journey:
Ibn Batuta set out on his journey in 1325 from his hometown of Tangier in Morocco. His primary motivation was to fulfill his religious duty of performing Hajj, the pilgrimage to Mecca. However, his travels took him far beyond the boundaries of the Islamic world.

Arrival in Kerala:
Ibn Batuta arrived in India through the Malabar Coast, which is now known as Kerala. He made his way to the city of Calicut, a vibrant trading hub during that time. Calicut was known for its spices, especially pepper, which attracted merchants from various parts of the world.

Exploration of Kerala:
During his stay in Kerala, Ibn Batuta explored the region extensively. He was fascinated by the natural beauty of Kerala, its backwaters, and lush green landscapes. He also observed the rich cultural heritage of the region, including its unique architecture and religious practices.

Interaction with Rulers:
Ibn Batuta had the opportunity to meet and interact with the local rulers of Kerala. He was particularly impressed by the Zamorin, the ruler of Calicut, who extended his hospitality and provided him with valuable insights into the local society and governance.

Trade and Commerce:
Kerala's strategic location on the Arabian Sea made it a significant center for trade and commerce. Ibn Batuta witnessed the bustling trade activities in Calicut and the arrival of merchants from different parts of the world, including China, Persia, and Egypt.

Cultural Exchange:
Ibn Batuta also observed the cultural diversity and religious tolerance in Kerala. He encountered people practicing different faiths, including Hindus, Muslims, and Christians. His observations shed light on the harmonious coexistence of various religious communities in the region.

Legacy:
Ibn Batuta's travels were documented in his famous travelogue, "Rihla." This comprehensive account of his journey not only provides valuable insights into the regions he visited but also offers a glimpse into the historical, cultural, and social aspects of the time.

Conclusion:
In conclusion, Ibn Batuta traveled to Kerala, a little less than seven hundred years ago. His journey to this region was a part of his extensive exploration of various countries and cultures. Ibn Batuta's observations and experiences in Kerala provide us with valuable historical and cultural knowledge about the region during that period.