Option a is the correct answer. Pair 1 is incorrectly matched: "Hammir Raso" is the biography of Hammiradeva, the final Chauhan ruler of Ranthambore, authored by the poet and scholar Jodharaja and not Abdur Rehman. The book vividly portrays Hammirdeva's character and his noteworthy conquests during his reign. Pair 2 is correctly matched: "Prithvi Raj Raso" is a historical epic composed by Chand Bardai, recounting the life and valor of Prithviraj Chauhan, the Rajput king of Delhi. It vividly narrates his battles, romance, and ultimate downfall. Pair 3 is correctly matched: "Alha Khand" refers to Hindi poetic works narrating valorous deeds of Banaphar heroes, Alha and Udal, under king Paramardi-Deva against Prithviraj Chauhan. Written by Jagnayak (or Jagnik), it has diverse recensions like Mahoba Khand and Alha-khand. The work laments Hindu kingdom decline and end, sung by bards in northern India. Pair 4 is correctly matched: "Bisaldev Raso," composed by Narpati Nalah, is a notable Rajasthani work with historical variations. Divided into four sections, it describes Bisaldev's marriage, anger-induced Odisha journey, Rajmati's separation, and her return. The language is Rajasthani, not literary Hindi, with a focus on shringar ras (romantic sentiment).