Introduction:
The correct answer is option 'B', Ramanuja. Ramanuja was a prominent philosopher and theologian who was born in Tamil Nadu in the eleventh century. He was deeply influenced by the Alvars, a group of Tamil poet-saints who were known for their devotion to Lord Vishnu. Ramanuja's philosophical teachings and interpretations of the scriptures were heavily influenced by the works of the Alvars.

Ramanuja and the Alvars:
Ramanuja considered the Alvars to be his spiritual predecessors and sought inspiration from their writings and teachings. The Alvars composed devotional hymns in Tamil, collectively known as the Divya Prabandham, which expressed their intense love and devotion for Lord Vishnu. These hymns were highly regarded by Ramanuja, and he incorporated their teachings into his own philosophical system.

Philosophical Influence:
Ramanuja's interpretation of Vishishtadvaita, a non-dualistic philosophy, was shaped by his deep understanding of the Alvars' works. He believed that the ultimate reality is Lord Vishnu, and the individual souls are eternally dependent on him. Ramanuja emphasized the concept of surrendering to the divine will and attaining salvation through devotion and service to God. This devotional approach was influenced by the Alvars' unwavering love and dedication to Lord Vishnu.

Legacy:
Ramanuja's teachings and philosophical system had a profound impact on the Bhakti movement in South India. His emphasis on devotion and service to God resonated with the masses, and his followers established vibrant Vaishnavite communities. Ramanuja's influence extended beyond Tamil Nadu, and his teachings are still revered by millions of followers today.

Conclusion:
Ramanuja, born in Tamil Nadu in the eleventh century, was deeply influenced by the Alvars. The Alvars' devotional hymns and teachings inspired Ramanuja's philosophical interpretations, leading to the development of his Vishishtadvaita philosophy. Ramanuja's emphasis on devotion and surrender to God had a lasting impact on the Bhakti movement in South India, and his teachings continue to be influential in the present day.