Consider the following statements about the Chausath Yogini Temple at Mitaoli, near Morena in Madhya Pradesh:

1. It was constructed during the rule of the Kachchhapaghata dynasty.

2. It is the only circular temple structure known in India.

3. It was built primarily to promote worship associated with the Vaishnava cult.

4. Its circular design is popularly believed to have inspired the shape of India's Parliament building.

How many of the statements given above are correct?