Navanitakam of the Gupta period was a book on

Answer & Explanation

Answer: [D]

Navanitakam is a Sanskrit treatise that focuses on metallurgy, specifically the techniques and processes involved in the extraction and refinement of metals. It provides valuable insights into the knowledge and practices of metallurgy during the Gupta period in ancient India. The treatise covers various aspects such as mining, smelting, alloying, and the purification of metals. It discusses different types of metals, their properties, and their applications in different fields. Navanitakam is considered an important text for understanding the advancements and techniques in metallurgy during the Gupta era.