History · Ancient Indian History & Buddhist Sites

Consider the following statements with reference to important Buddhist relic sites in India: I. Nagarjunakonda, a major Buddhist relic site, is located in Andhra Pradesh and was submerged after the construction of the Nagarjuna Sagar Dam, following which relics were relocated to an island museum. II. Devni Mori in Gujarat yielded Buddhist relics and a casket, and the site is associated with the early centuries AD. III. The stupa at Vaishali in Bihar is believed to contain a portion of the Buddha's ashes and is associated with the Licchavis, who were maternal relatives of the Buddha. IV. Under Indian law, Buddhist relics classified as 'AA' antiquities can be temporarily relocated abroad for purposes of cultural diplomacy with explicit government approval. Which of the statements given above are correct?