उत्तर : 3. "सरसों"
व्याख्या :

1. It starts from the beginning of winter and continues till the beginning of summer (October–December to April–June).

2. Rabi crops include wheat, barley, gram, oats, mustard, linseed, potato and oilseeds.

3. Availability of rainfall during winter months due to western temperate cyclones helps in the success of these crops.