Firuz Shah established the city ............. .

The correct answer is Option D: Hisar.
Let's break down why:
* Firuz Shah Tughlaq was a ruler of the Delhi Sultanate.
* He was known for establishing several cities during his reign.
* Hisar was one of the important cities founded by him.
* Fatehabad was also founded by Firuz Shah Tughlaq, but it was named after his son Fateh Khan.
* While Gurugram has a much older history, it wasn't founded by Firuz Shah.
* Similarly, Agroha is an ancient site with historical significance, but Firuz Shah was not its founder.
*Therefore, the most appropriate answer is Hisar since Firuz Shah actually established it.