Directions: Read the passage given below carefully and then answer the following questions that follow 

Delhi has a long history and has been an important political centre of India as the capital of several empires. Areas around Delhi was known as Indraprastha and Delhi's ancient history is recorded in the Indian epic Mahabharatha. The earliest coverage of Delhi's history is in the onset of Tomar's kingdom in the 8th century. Since then, Delhi has been the centre of a ___(1)___ of mighty empires and powerful kingdoms, making Delhi one of the longest-serving capitals and one of the oldest ___(2)___ cities in the world. It is considered to be a city built, destroyed and rebuilt several times, as outsiders who successfully ___(3)___ the Indian Subcontinent would ransack the existing capital city in Delhi, and those who came to conquer and stay would be so impressed by the city's strategic location as to make it their capital and rebuild it in their own way.
For 457 years (736 to 1193 AD), Delhi was ruled by the Tomar (or Tanwar) clan of Rajputs. It is the longest period for which any known dynasty has ruled over Delhi and surrounding areas. The Delhi Sultanate is the name given for a series of five successive dynasties, which remained as a ___(4)___ power of the Indian subcontinent with Delhi as their capital. The rule of the Delhi Sultanate was ___(5)___ in 1206 by Qutub-ud-Din Aibak. The relics of the Delhi Sultanate include the Qutb Minar and its surrounding monuments and the Tughlaqabad Fort. During this time, the city became a centre for culture. The Delhi Sultanate came to an end in 1526, when Babur defeated the forces of the last sultan of Delhi, Ibrahim Lodi at the First Battle of Panipat, and formed the Mughal Empire.