The correct option is (d).
Explanation
The period of the Janapadas and Mahajanapadas (circa 600 BCE) is characterized by the widespread use of iron technology in agriculture and the emergence of settled agrarian communities. This agricultural expansion formed the economic base for the Second Urbanisation.
Archaeological excavations and literary texts confirm that a wide variety of crops were cultivated in these settlements to support the growing population and the emerging state structures.
- Statement 1 is Correct: Rice was a primary crop, and the introduction of the paddy transplantation technique during this period significantly increased production.
- Statement 2 is Correct: Wheat was extensively grown, particularly in the regions corresponding to the later Vedic and early Mahajanapada settlements.
- Statement 3 is Correct: Sugarcane is explicitly mentioned in texts of the period as a cultivated crop used for producing sugar (guda/sharkara).
- Statement 4 is Correct: Sesame (Til) was a major oilseed crop grown alongside mustard.
Key Takeaway: The agricultural economy of the Janapadas was diverse and surplus-oriented, utilizing iron ploughshares to grow crops such as rice, wheat, barley, pulses, sugarcane, sesame, and mustard.