The correct answer is (b), Eran inscription.
The Eran inscription is a 4th-century CE rock-cut inscription found in Eran, Madhya Pradesh, India. It is one of the earliest inscriptions to mention the practice of sati, or widow burning. The inscription records the gift of a village to a temple by a man who had lost his wife. The inscription states that the man’s wife had died on her husband’s funeral pyre, and that he had made the gift in her memory.
The Eran inscription is significant because it provides early evidence of the practice of sati. The inscription also suggests that the practice was not universally accepted at the time, as the man who made the gift was apparently motivated by a desire to honor his wife’s memory.
The other options are incorrect because they do not mention the practice of sati. The Prayag Prashasti is a 6th-century CE inscription found in Prayag, Uttar Pradesh, India. The Junagarh inscription is a 11th-century CE inscription found in Junagadh, Gujarat, India. The Ajanta inscription is a 6th-century CE inscription found in Ajanta, Maharashtra, India.