Which of the following is NOT a part of Buddhist stupas?

The correct answer is Option (2) → Gopura

Out of the listed elements, the one NOT part of Buddhist stupas is:

• Gopura

Here's a breakdown of the other elements:

• Harmika: A square railing placed on the top of the anda (hemispherical dome) of the stupa.
• Anda: The main dome-shaped structure of the stupa, often symbolic of the burial mound.
• Chhatra: A multi-tiered umbrella structure positioned on a central pillar above the anda, representing protection and royalty.

Gopura is a monumental entrance gate or tower commonly found in South Indian temple architecture, particularly associated with Hinduism. It's not a typical feature of Buddhist stupas.