Which of the following classes of goods accounts for largest proportion of Nigeria's imports?

Machinery and transport equipment account for the largest proportion of Nigeria's imports. This is because Nigeria, like many developing countries, relies heavily on imported machinery and equipment for industrial production and development. Machinery and transport equipment include items such as vehicles, aircraft, telecommunications equipment, and industrial machinery, which are essential for the development of Nigeria's infrastructure and industries. Additionally, Nigeria has limited manufacturing capabilities, which means that it relies on imports for finished products, such as machinery and equipment, to meet its development needs. Therefore, machinery and transport equipment account for a significant proportion of Nigeria's imports, much more than food and animal products, consumer goods, or chemicals.