The correct answer is option 2, Narayana Bhatta. The author of the 16th century Sanskrit text, the Vraja Bhakti Vilas, is Narayana Bhatta. This text focuses on the Braj region in North India.

Option 1, Todar Mal, is not the correct answer. Todar Mal was a prominent finance minister in the court of Emperor Akbar and was known for his involvement in revenue reforms, not for writing Sanskrit texts.

Option 3, Chaitanya, is also not the correct answer. Chaitanya refers to Chaitanya Mahaprabhu, a 16th-century saint and founder of the Gaudiya Vaishnavism tradition. While Chaitanya Mahaprabhu played a significant role in promoting devotional practices in the Braj region, he is not the author of the Vraja Bhakti Vilas.

Option 4, Rupa Goswami, is also not the correct answer. Rupa Goswami was a prominent theologian and poet in the 16th century, known for his works on devotion and bhakti. While he wrote extensively about devotion, he is not attributed as the author of the Vraja