The correct option is A Jute
Jute is one of the most important natural fibers after cotton in terms of cultivation and usage. Cultivation is dependent on the climate, season and soil. Almost 85% of the world's jute cultivation is concentrated in the Ganges delta. This fertile geographic region is shared by both Bangladesh and India (West Bengal). China also has a dominating place in jute cultivation. The top ten jute producing states in India are West Bengal, Assam, Nagaland, Meghalaya, Tripura, Bihar, Uttar Pradesh, Orissa, Andhra Pradesh and Telangana. So, Jute may called as largest fibre crop of east India compared to cotton, coir and flax. Thus, option A is correct.