Option c is the correct answer. The Kathopanishad is part of the Yajur Veda and is considered one of the most important and widely studied Upanishads. The Kathopanishad is presented as a dialogue between a young seeker named Nachiketa and the god of death, Lord Yama (also known as Yamaraja). The text explores themes such as the nature of the self (Atman), the impermanence of life, and the path to spiritual realization and liberation (Moksha). Important Tips Facts about Kenopanishad: The Kenopanishad, also known as the Kena Upanishad, is one of the ancient Upanishads that are part of the Vedic literature in Hinduism. It is considered one of the principal Upanishads and is associated with the Sama Veda. It is divided into four parts or Khandas. It deals essentially with the nature of Brahman and knowledge of the Self. The Kenopanishad explores philosophical and spiritual themes, particularly focusing on the nature of ultimate reality (Brahman) and the relationship between the individual self (Atman) and Brahman.