The correct answer is C. 13.
There are 13 forts in Haryana that are believed to have been built during the Mahabharata period. These forts are located in different parts of the state, and each one has its own unique history and significance.
Some of the most famous forts in Haryana include:
- The Ahirachal Fort, which is located in the district of Rewari. This fort is believed to have been built by the Pandavas during the Mahabharata war.
- The Pipli Fort, which is located in the district of Kurukshetra. This fort is believed to have been built by the Kauravas during the Mahabharata war.
- The Panipat Fort, which is located in the district of Panipat. This fort is believed to have been built by the Tomar Rajputs in the 11th century.
- The Rohtak Fort, which is located in the district of Rohtak. This fort is believed to have been built by the Mughals in the 16th century.
- The Hisar Fort, which is located in the district of Hisar. This fort is believed to have been built by the Tomar Rajputs in the 11th century.
These forts are important historical sites, and they provide a glimpse into the past of Haryana. They are also popular tourist destinations, and they attract visitors from all over the world.
The other options are incorrect because they do not represent the correct number of forts in Haryana that are believed to have been built during the Mahabharata period.