The correct answer is C. Vallabhacharya.
Pushti marg is a Vaishnav sect of Hinduism that was founded by Vallabhacharya in the 16th century. It is a devotional sect that emphasizes the love of Krishna. Vallabhacharya believed that Krishna was the supreme being and that he could be attained through devotion and love. He also taught that the path to salvation was through bhakti, or devotion to Krishna.
Shankaracharya was a Hindu philosopher who lived in the 8th century. He is considered to be one of the most important figures in Hinduism. He is known for his Advaita Vedanta philosophy, which teaches that Brahman, the ultimate reality, is one and that the individual soul is identical to Brahman.
Ramanujacharya was a Hindu philosopher who lived in the 11th century. He is considered to be one of the most important figures in Vaishnavism. He is known for his Visistadvaita Vedanta philosophy, which teaches that Brahman is one but that the individual soul is different from Brahman.
Nimbarkacharya was a Hindu philosopher who lived in the 12th century. He is considered to be one of the most important figures in Dvaita Vedanta philosophy, which teaches that Brahman and the individual soul are separate entities.
In conclusion, the correct answer to the question “Pushti marg is a Vaishnav sect of the Hinduism was founded by?” is C. Vallabhacharya.