With reference to Indian history, consider the following statements : 1. The first Mongol invasion of India happened during the reign of Jalal-ud-din Khalji. 2. During the reign of Ala-ud-din Khalji, one Mongol assault marched up to Delhi and besieged the city. 3. Muhammad-bin-Tughlaq temporarily lost portions of north-west of his kingdom to Mongols. Which of the statements given above is/are correct?

Statement 2 is correct because in 1303, a Mongol army led by Targhi marched to Delhi and besieged the city, forcing Ala-ud-din Khalji to take shelter in the Siri Fort. Statement 1 is the most common error as the first Mongol threat actually appeared much earlier in 1221 during the reign of Iltutmish, when Genghis Khan reached the Indus River. The core concept tested is the chronological history and specific military challenges posed by Mongol invasions during the Delhi Sultanate.