The crops grown after the summer monsoon are called Rabi crops. Rabi crops are sown in the winter season, typically from October to December, and harvested in spring, usually from April to June. These crops require a cool climate and a longer growing season. Some examples of Rabi crops include wheat, barley, mustard, peas, and gram.

Option 1, Kharif crops, refers to the crops grown during the summer season, which are sown in the rainy season and harvested in the autumn months. Option 3, Annual crops, denotes crops that complete their life cycle within one year. Option 4, Seasonal crops, is a general term that can refer to crops grown in any season, including both Kharif and Rabi crops.

Therefore, the correct answer is option 2, Rabi.