Option 1: Al-Biruni - Al-Biruni was an Iranian scholar and polymath who lived in the 11th century. While he was known for his extensive studies of various subjects, including mathematics, astronomy, and history, there is no evidence to suggest that he wrote commentaries on Harshavardhana`s administration or court life in Kanauj. Therefore, option 1 is not correct.

Option 2: Fa-Hien - Fa-Hien was a Chinese Buddhist monk who traveled extensively in India during the 5th century. He is famous for his travelogue, "Record of Buddhistic Kingdoms," which describes his journey and the places he visited. While his account provides valuable insights into the Indian history and culture of his time, he did not specifically write commentaries on Harshavardhana`s administration or court life in Kanauj. Therefore, option 2 is not correct.

Option 3: Hiuen-Tsang - Hiuen-Tsang, also known as Xuanzang, was a Chinese Buddhist monk who traveled to India in the 7th century. He is famous for his detailed records of his travels and the Buddhist sites he visited. Among his writings, there are commentaries on the administration and