Match the following Parts of the stupa in List 1 with the description associated with it in List 2:

(A)- II, (B)- IV, (C)- I, (D)- III

The stupa, originating from the Sanskrit term meaning a "heap," began as a simple semi-circular earth mound known as an "anda." Over time, it underwent a transformation, evolving into a more intricate architectural form that skillfully combined circular and square elements. Situated atop the anda was the "harmika," resembling a balcony, symbolizing the dwelling place of deities. Extending from the harmika was a central mast called the "yashti," frequently crowned with a "chhatri" or umbrella. Encompassing the mound was a protective railing, demarcating the sacred realm from the secular world.