The best option is the fourth: "The Budha's remains are placed on display for visitors to worship." The stupa is considered to be a sepulchral monument. A place of burial or a receptacle for religious objects. In Buddhism, the earliest stupas contained portions of the Buddha’s ashes. This resulted in people beginning to associate the building with the body of the Buddha. These ashes were buried in stupas located in places associated with important events in the life of the Buddha including Lumbini (the place where he was born), Bodh Gaya (where it is believed he achieved enlightenment), Deer Park at Sarnath (where he preached his first sermon sharing the "Four Noble Truths", also known as dharma or the law), and Kushingara (where he died).
