The correct answer is (a) Amir Khusru.
Amir Khusru was a 13th-14th century Indian Sufi musician, poet, and scholar. He is considered to be one of the most important figures in the development of Hindi literature. He is also credited with developing the Khari Boli dialect of Hindi, which is the basis for modern standard Hindi.
Malik Muhammad Jaisi was a 16th-century Indian poet. He is best known for his epic poem Padmavat, which tells the story of the Rajput princess Padmavati.
Kabir was a 15th-16th century Indian mystic poet and saint. He is considered to be one of the most important figures in the Bhakti movement.
Abdul Rahim-Khan-i-Khanan was a 16th-century Indian poet and statesman. He was a court poet of the Mughal emperor Akbar.
Amir Khusru is considered to be the “Father of Hindi Khadi Boli” because he was the first to use this dialect in his poetry. He also played a major role in developing the Khari Boli dialect of Hindi.