Inflation is defined as a sustained increase in the general price level of goods and services in an economy over a period of time. When the general price level rises, each unit of currency buys fewer goods and services; consequently, inflation reflects a reduction in the purchasing power per unit of money.

The phrase 'Knowledge is power' (scientia potentia est) is famously attributed to the English philosopher, statesman, and scientist Sir Francis Bacon. It appears in his work 'Meditationes Sacrae' (1597). This concept emphasizes the idea that human knowledge and the understanding of nature provide the means to control and improve the human condition through scientific advancement and rational inquiry.

Marco Polo was a Venetian merchant and explorer who gained fame for his extensive travels throughout Asia during the 13th century. His detailed accounts of his journeys, particularly his time spent in the court of Kublai Khan in China, provided Europeans with their first comprehensive look at the culture, geography, and trade networks of the East, significantly influencing later exploration.

The Badshahi Mosque, an iconic example of Mughal architecture, was commissioned by Emperor Aurangzeb Alamgir. Construction began in 1671 and was completed in 1674. Located in Lahore, it served as a grand symbol of Mughal power and religious devotion. The mosque is renowned for its massive red sandstone structure, intricate marble inlay work, and vast courtyard, remaining one of the most significant historical landmarks in Pakistan and a testament to the architectural brilliance of the Mughal era.

François Bernier was a French physician and traveler who spent twelve years in India during the reign of Emperor Aurangzeb. He served in the Mughal court and documented his observations in his famous work, 'Travels in the Mogul Empire'. His writings provide significant historical insights into the administration, economy, and social life of the Mughal Empire during the 17th century.

The Battle of Samugarh, fought in May 1658, was the decisive conflict in the war of succession among the sons of Shah Jahan. Aurangzeb and his brother Murad Baksh defeated the forces of the crown prince Dara Shikoh. This victory effectively secured the Mughal throne for Aurangzeb, leading to the imprisonment of his father and the eventual execution of Dara Shikoh. It marked a major turning point in the history of the Mughal Empire.

Aurangzeb Alamgir was the last of the great Mughal emperors. During his long reign of nearly 50 years, the Mughal Empire expanded significantly, reaching its zenith in terms of both territorial size and economic power. By the time of his death in 1707, his authority extended across almost the entire Indian subcontinent, though this vast expansion also brought administrative and financial challenges that contributed to the empire's later decline.

Maulana Jalal-ud-Din Rumi was born in 1207 A.D. in the city of Balkh, which is located in present-day Afghanistan. Although he spent the majority of his life in Konya, Turkey, where he composed his famous works like the Masnavi, his early life and formative years were rooted in the Persian-speaking region of Balkh. He is celebrated globally for his profound contributions to Sufi literature and philosophy.

Abu Rayhan al-Biruni was a polymath who authored 'Al-Athar al-Baqiyah'. This seminal work provides a comprehensive study of calendars and eras used by various ancient civilizations. Additionally, Al-Biruni demonstrated advanced scientific insight by discussing the rotation of the Earth on its axis and providing highly accurate calculations for geographical longitudes and latitudes.

Thallium was discovered by the British chemist William Crookes in 1861 using spectroscopic analysis. The element is named after the Greek word 'thallos', meaning a green shoot, due to the bright green line in its emission spectrum. While the provided answer key points to Mendeleev, historical records confirm the discovery by Crookes.