Consider the following currents in the world.

1. Humboldt current
2. Alaskan current
3. Brazil current
4. Kuroshio current
5. Falkland current
6. Aghulhas current
7. East Australia current

Which of the currents given above is/are cold current?
a) 1, 3, 4, 5 and 7 only
b)1 and 5 only
c) 2, 6 and 7 only
d)2, 4 and 6 only

Ans-[B] 

Explanation– The Humboldt Current is a cold, low-salinity ocean current that flows north along the west coast of South America from the southern tip of Chile to northern Peru. Also called the Peru Current, it is an eastern boundary current flowing in the direction of the equator, and can extend 1,000 kilometers offshore.

The Falkland Current (also called Malvinas Current or Falklands Current) is a cold water current that flows northward along the Atlantic coast of Patagonia as far north as the mouth of the Río de la Plata. This current results from the movement of water from the West Wind Drift as it rounds Cape Horn. It takes its name from the Falkland Islands.

The Alaska Current is a southwestern warm-water current along the coast of British Columbia.

The Brazil Current is a warm water current that flows south along the Brazilian south coast to the mouth of the Río de la Plata. This current is caused by diversion of a portion of the Atlantic South Equatorial Current from where that current meets the South American continent.

The Kuroshio is a north-flowing ocean current on the west side of the North Pacific Ocean. It is similar to the Gulf Stream in the North Atlantic and is part of the North Pacific ocean gyre.

The Agulhas Current is the warm water current of the southwest Indian Ocean.

The East Australian Current  is the southward western boundary warm current that is formed from the South Equatorial Current reaching the eastern coast of Australia.