Answer : 3. "बुद्धा"
Explanation :

Four bone fragments of Lord Buddha, known as Kapilavastu Relics, discovered by William Claxton Peppe in 1898 in Piprahwa, Uttar Pradesh, will be taken to Thailand after 30 years. These remains were excavated from the ancient city of Kapilvastu. According to Buddhist beliefs, Buddha attained salvation at the age of 80 in Kushinagar, Uttar Pradesh, and his remains were divided among different communities to build stupas, later Ashoka used them to spread Buddhism. Installed in many stupas.