Anasagar Lake is actually located in the state of Rajasthan, India, hence the correct answer is option 3. Each of the other options suggested refers to a different state in India:

Option 1: Gujarat - This is incorrect. Anasagar Lake is not located in Gujarat. This state is known for its own popular bodies of water, such as Tarnetar Lake and Vastrapur Lake.

Option 2: Uttarakhand - This is also incorrect. Uttarakhand is known for its own lakes like Nainital Lake and Kedartal Lake, but not Anasagar Lake.

Option 4: Karnataka - This is incorrect as well. Karnataka does have several large lakes such as Kere Basadi and Agara Lake, but Anasagar Lake is not found here.

Therefore, option 3, which states that Anasagar Lake is in Rajasthan, is the correct answer. Anasagar Lake is an artificial lake situated in Ajmer, a city in Rajasthan, built by Arnoraja, the grandfather of Prithviraj Chauhan, in 1135-1150 AD.