Explanations:
Rajasthan, known for its vast deserts, historical forts, and vibrant culture, is not typically associated with hill stations. However, it does have one notable hill station: Mount Abu. Mount Abu is located in the Aravalli Range, which is the longest mountain range in India and stretches across Rajasthan and Gujarat. The Aravalli Range is unique because it is one of the oldest mountain ranges in the world, formed over 1.8 billion years ago during the Precambrian era.
Mount Abu is situated at an elevation of about 1,220 meters (4,000 feet) above sea level, making it a popular destination for tourists seeking a cooler climate compared to the rest of Rajasthan. The hill station is known for its lush greenery, serene lakes, and historical sites such as Dilwara Jain Temples and the Nakki Lake. The pleasant climate and scenic beauty of Mount Abu make it a significant tourist attraction in Rajasthan.
It is important to note that while Rajasthan has many other notable locations, such as Udaipur (Option A), which is known for its lakes and palaces, and Mahabaleshwar (Option D), which is a hill station in Maharashtra, these are not hill stations within Rajasthan. Ooty (Option C) is a well-known hill station in Tamil Nadu, not in Rajasthan. Therefore, Mount Abu stands out as the only hill station in Rajasthan.