The correct answer is (d). The Benguela Current is an eastern boundary current that flows northward along the west coast of Africa. It is a cold current that originates in the Antarctic and brings cold, nutrient-rich water to the surface. The other three options are all currents that flow in the Indian Ocean.
The Agulhas Current is a warm current that flows southward along the east coast of Africa. It is a western boundary current that originates in the Indian Ocean and brings warm, nutrient-rich water to the surface. The Mozambique Current is a warm current that flows northward along the east coast of Africa. It is a western boundary current that originates in the Indian Ocean and brings warm, nutrient-rich water to the surface. The South Indian Ocean Current is a circumpolar current that flows eastward around the southern tip of Africa. It is a warm current that originates in the Indian Ocean and brings warm, nutrient-rich water to the surface.