The Rajgir Hills in Bihar are known for their:

The correct answer is: d) All of the above.

The Rajgir Hills in Bihar are known for their hot springs, waterfalls, and caves. The hot springs are said to have medicinal properties and are a popular tourist attraction. The waterfalls are beautiful and offer a refreshing respite from the heat. The caves are ancient and offer a glimpse into the history of the region.

Here is a brief description of each of the options:

• Hot springs: The Rajgir Hills are home to a number of hot springs, which are said to have medicinal properties. The springs are located in the hills and are surrounded by lush vegetation. The water in the springs is hot and clear, and it is said to be beneficial for skin and hair health.
• Waterfalls: The Rajgir Hills are also home to a number of waterfalls, which are a popular tourist attraction. The waterfalls are located in the hills and are surrounded by lush vegetation. The water in the waterfalls is clear and refreshing, and it is a popular spot for swimming and picnicking.
• Caves: The Rajgir Hills are also home to a number of caves, which are ancient and offer a glimpse into the history of the region. The caves are located in the hills and are surrounded by lush vegetation. The caves are said to have been used by Buddhist monks in the past, and they offer a unique and interesting experience for visitors.