During the period of Harshavardhana, the fields were watered by the pots of the ghati-yantra. This is known from the writings of

Answer & Explanation

Answer: [A]

The information about the fields being watered by the pots of the ghati-yantra during the period of Harshavardhana is known from the writings of Hiuen Tsang. Hiuen Tsang was a Chinese Buddhist monk and traveler who visited India during the reign of Harshavardhana and recorded his observations and experiences in his travel accounts. His writings provide valuable insights into the socio-cultural and political aspects of ancient India. Therefore, option A is the correct answer.