How did the Mongol threat influence Alauddin Khalji's domestic policies?

It necessitated a large standing army, leading to strict market reforms and price controls to sustain the military without draining the treasury.

Mongol Invasions of India | Delhi Sultanate History

Q: With reference to Indian history, consider the following statements: 1. The first Mongol invasion of India happened during the reign of Jalal-uddin 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?

The first Mongol invasion occurred under Iltutmish, not Jalal-uddin Khalji. Alauddin Khalji successfully defended a siege of Delhi by the Mongols, whereas Muhammad bin Tughlaq managed the threat through ransoms rather than territorial loss.

ID: HIS_MED_2022_02 Ref: Satish Chandra, Medieval India: From Sultanat to the Mughals

With reference to Indian history, consider the following statements:
1. The first Mongol invasion of India happened during the reign of Jalal-uddin 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?