The correct answer is B. Surdas.
Surdas was a 16th-century Indian poet and musician who is considered one of the greatest composers of devotional songs in the Braj language. He was a disciple of Vallabhacharya, a Hindu saint and philosopher who founded the Pushtimarga sect. Surdas’s songs are primarily about the love between Krishna and Radha, and they are still widely sung and enjoyed today.
A. Tulsidas was a 16th-century Indian poet and saint who is best known for his epic poem Ramacharitamanasa. He was not a disciple of Vallabhacharya.
C. Tukaram was a 17th-century Indian poet and saint who is best known for his devotional songs in the Marathi language. He was not a disciple of Vallabhacharya.
D. Ramanuja was a 11th-century Indian philosopher and theologian who is considered one of the most important figures in the Sri Vaishnava tradition. He was not a disciple of Vallabhacharya.