The correct answer is D. Tulsidas.
Tulsidas was a 16th-century Indian poet-saint who is considered one of the greatest writers in the Hindi language. He is best known for his epic poem Ramacharitamanasa, which is a retelling of the Ramayana from the perspective of Rama’s wife, Sita. Tulsidas was also a reformer and philosopher who advocated for social justice and religious tolerance.
Ramanada was a 12th-century Indian saint and reformer who is considered the founder of the Ramanandi Sampradaya, one of the largest Hindu sects. Ramananda was a disciple of Ramanujacharya, the founder of the Sri Vaishnava sect. Ramananda is credited with spreading the message of bhakti, or devotion to God, to all castes and classes of people.
Tukaram was a 17th-century Indian poet-saint who is considered one of the greatest writers in the Marathi language. He is best known for his devotional songs, which are known for their simple language and deep spiritual insights. Tukaram was a follower of the Varkari sect of Hinduism, which is devoted to the god Vithoba.
Valmiki was a 7th-century Indian sage who is considered the author of the Ramayana, one of the two major epics of Hinduism. Valmiki is also credited with being the founder of the Sanskrit language.
In conclusion, the correct answer is D. Tulsidas.