The correct answer is option 4 - Statue of Unity. The Panchmuli Lake is situated near the Statue of Unity. The Statue of Unity is a colossal statue dedicated to Vallabhbhai Patel, who was the first Deputy Prime Minister and first Minister of Home Affairs of India. It is located in the state of Gujarat, India. The statue is the tallest statue in the world, with a height of 182 meters (597 feet). It is a major tourist attraction and a symbol of national unity.

It is important to note that options 1, 2, and 3 mentioned in the question are incorrect. The Statue of Eality, Thiruvalluvar Statue, and Dhyan Buddha Statue are different statues located in different places. Therefore, it is essential to carefully read the options and verify the information before selecting the correct answer.