Jute is primarily cultivated during the Kharif season in Assam. The Kharif season is the monsoon season, which runs from June to September. Jute is a tropical plant that requires a lot of water to grow, so it is planted during the monsoon season when there is plenty of rainfall. The Kharif season is also the warmest season in Assam, which is ideal for the growth of jute.
The Rabi season is the winter season, which runs from October to March. The Rabi season is not ideal for the growth of jute because it is too cold and there is not enough rainfall. The Zaid season is the summer season, which runs from April to May. The Zaid season is also not ideal for the growth of jute because it is too hot and there is not enough rainfall.
The correct answer is: a) Kharif