Consider the following statements about the agrarian system under the Delhi Sultanate and Mughal empire:
1. Alauddin Khilji imposed taxes called charai and ghari.
2. Muhammad bin Tughlaq imposed additional cesses called abwabs on the peasants.
3. Under Akbar, dahsala system of land revenue existed.
4. Jahangir introduced the nasq system of assessment.
Which of the above statements are correct?
1. 1, 2, 3 and 4
2. 1, 2 and 3 only
3. 2 and 3 only
4. 1 and 4 only