The correct answer is (b), Vikramankadevacharita.
Vikramankadevacharita is a Sanskrit historical romance written by Sandhyakarnandin in the 12th century. It is the story of the life of Vikramankadeva, the king of the Western Chalukya dynasty. The text is divided into 12 chapters and is written in the kavya style.
Ramacharitam is a Sanskrit epic poem written by Kamban in the 12th century. It is the story of Rama, the hero of the Ramayana. The text is divided into 7 cantos and is written in the anushtup meter.
Sandesh Rasak is a Sanskrit love poem written by Vidyakara in the 12th century. It is the story of a young man who falls in love with a young woman. The text is divided into 10 chapters and is written in the sloka meter.
Amuktamalyad is a Sanskrit devotional poem written by Jagannatha Panditaraya in the 16th century. It is the story of the goddess Lakshmi. The text is divided into 10 chapters and is written in the sloka meter.