‘Boro’, ‘Aman’ and ‘Aus’ are _________.

Fill in the blank with the correct option.

The correct option is Names of rice crops.

Step-by-Step Explanation:

1. Understanding the Terms: "Boro", "Aman", and "Aus" are the traditional vernacular names given to three distinct seasonal agricultural crops of rice (paddy) grown in regions like West Bengal, Bihar, Assam, and Bangladesh.
2. Seasonal Classification of Rice in India:
- Aus (Autumn Rice): This crop is sown during the pre-monsoon season (around May-June) and harvested in autumn (around September-October).
- Aman (Winter Rice): This is the main rice crop, sown during the monsoon season (June-July) and harvested in winter (November-December). It accounts for the majority of the rice cultivation area.
- Boro (Summer/Winter Rice): This crop is sown in winter (November-January) and harvested in summer (April-May), utilizing irrigation facility where water is available.
3. Conclusion: Since these terms correspond specifically to different sowing and harvesting seasons of paddy, they are classified as names of rice crops.