Which of the following parts/structures is located at the topmost part of a Stupa?​

Correct option is B

• A Stupa is a dome-shaped sacred burial mound of brick that was used to house Buddha's relics, It is used to commemorate significant facts and events related to Buddhism.
• Sanchi, Sarnath, Amaravati, and Bharhut are among the oldest known stupas.
• The Harmika is the part of a stupa located at the topmost part.
• A square railing that surrounds the top of the stupa. 
• It is sometimes topped with an umbrella as a symbol of respect and honour.