The main crops of Sikkim are

rice, maize, bajra, wheat, barley, cardamom
sugarcane, tobacco, wheat, rice,
chillies, oilseeds, groundnut, pepper
None of the above

The correct answer is A. rice, maize, bajra, wheat, barley, cardamom.

Sikkim is a state in northeastern India. It is bordered by Bhutan to the north, China to the east, Nepal to the west, and West Bengal to the south. The state has a population of about 610,000 people and a land area of about 7,096 square kilometers. The capital of Sikkim is Gangtok.

The main crops of Sikkim are rice, maize, bajra, wheat, barley, and cardamom. Rice is the most important crop in Sikkim, accounting for about 60% of the state’s agricultural land. Maize is the second most important crop, accounting for about 20% of the state’s agricultural land. Bajra is a type of millet that is grown in the drier parts of Sikkim. Wheat is a winter crop that is grown in the higher elevations of Sikkim. Barley is a spring crop that is grown in the lower elevations of Sikkim. Cardamom is a spice that is grown in the forests of Sikkim.

The other options are incorrect because they do not include rice, which is the most important crop in Sikkim.