Correct option is D
- Assam's economy is predominantly agrarian, with agriculture being the backbone of its economic structure.
- The state is known for its fertile land, favorable climate, and significant production of crops like rice, tea, jute, and various fruits and vegetables. According to economic data, agriculture employs a large portion of Assam's workforce and contributes significantly to its GDP.
- While oil and natural gas (A) are important, particularly due to Assam's oil fields in Digboi and other areas, they are not the primary pillar compared to agriculture.
- Tourism (B) and manufacturing (C) are growing but do not surpass agriculture in economic significance.
- Therefore, the correct answer is (D) Agriculture.
