Imposition of tariff on the imported good based on Generalized System of Preference refers to

Correct option is D

The Generalized System of Preference provides different tariff rates for different groups of countries based on their development status. Under this system, tariffs are classified into general rates, preferential rates, and special concessional rates. Such a tariff structure involving three separate columns is known as a triple column tariff system. Therefore, tariff based on the Generalized System of Preference refers to a triple column tariff.
Information booster: The Generalized System of Preference is designed to promote exports from developing and least developed countries. It allows selected products to enter developed countries at reduced or zero tariff rates. This system supports economic growth and trade expansion in developing economies. Tariff classification systems play a key role in international trade policy formulation.
Why other options are incorrect: (a) Double column tariff involves only general and preferential rates, not three categories. (b) Embargo refers to a complete ban on trade, not tariff imposition. (c) Ad valorem duty is based on value of goods, not preferential trade structure.