The correct option is Auspicious couples depicted in an embracing posture.
Explanation
In the context of Indian art and architecture, the term Mithuna refers to a couple depicted in an amorous, embracing, or auspicious posture. These sculptures are a ubiquitous feature in Indian temple architecture, symbolizing fertility, abundance, and the auspicious union of opposing forces (Purusha and Prakriti).
Statement-wise Analysis
- Auspicious couples depicted in an embracing posture is Correct: Mithuna figures (auspicious couples) are commonly carved on temple walls, pillars, and entrance frames. They are considered mangala (auspicious) and are believed to ward off evil while representing the divine joy of union. They appear in various styles, including the Nagara temples of Khajuraho and the Dravida temples of South India.
- Fierce doorkeepers guarding the temple entrance is Incorrect: Fierce doorkeepers guarding the temple entrance are known as Dwarapalas. They are distinct guardian deities usually placed at the entrance of the Garbhagriha or the Gopuram.
- The principal deity residing in the garbhagriha is Incorrect: The principal deity residing in the Garbhagriha is the presiding deity (Moolnayak) and is not referred to by the architectural term 'Mithuna'.
- The crowning stone element of the temple tower is Incorrect: The crowning stone element of a temple tower is known as the Amalaka (in Nagara style) or the Stupi/Shikara (in Dravida style).
Key Takeaway
Mithuna denotes auspicious couples symbolizing fertility and divine union, whereas Dwarapalas are guardians, and terms like Amalaka or Stupi refer to structural crowning elements.