The correct option is A large Dharmachakra wheel.
Explanation
The Lion Capital of Ashoka at Sarnath is the finest example of Mauryan sculpture. It was erected by Emperor Ashoka to mark the site where Lord Buddha delivered his first sermon (Dharmachakrapravartana). The capital originally consisted of five distinct components, though the topmost element is often missing in popular depictions.Detailed Analysis:
- The Crowning Element: Originally, a large Dharmachakra (Wheel of the Law) with 32 spokes rested on the heads of the four lions. This wheel symbolized the spreading of the Dharma in all directions. Fragments of this large stone wheel were discovered during excavations at Sarnath and are preserved in the Sarnath Site Museum.
- Other Components: Below the crowning wheel, the capital features four Asiatic lions standing back-to-back, mounted on a circular abacus. The abacus depicts four animals (elephant, bull, horse, and lion) separated by smaller wheels. The entire structure rests on an inverted bell-shaped lotus.
- Incorrect Options:
- Amalaka and Kalasha: These are architectural elements associated with the Shikhara of Hindu temples (specifically Nagara style), developed much later during the Gupta and post-Gupta periods. They are not part of Mauryan pillar architecture.
- Triratna: While the Triratna is a significant Buddhist symbol representing the Buddha, Dharma, and Sangha, it was not the crowning finial of the Sarnath pillar.
Key Takeaway:
The Sarnath Lion Capital was originally surmounted by a large Dharmachakra (Wheel), signifying the "Turning of the Wheel of Law," making the total structure a five-part composition rather than the four parts commonly seen today.