Identify the correct statements.
A. The fastest and deepest geostrophic currents are found at the western boundaries of ocean basins.
B. Western boundary currents are more concentrated and eastern boundary currents are more diffusive.
C. Brazil current is the largest of the western boundary currents.
D. Canary, Benguela and Humboldt currents are eastern boundary currents.
Choose the correct answer from the options given below:

Correct option is A

The correct answer is: (a), a, b and d
Brazil current is NOT the largest of the western boundary currents. Gulf stream is the largest of the western boundary current.
The fastest and deepest geostrophic currents are found at the western boundaries of ocean basins" is correct This is because western boundary currents, such as the Gulf Stream in the North Atlantic and the Agulhas Current in the South Atlantic, are typically narrower and deeper than their eastern counterparts due to the Earth's rotation and the configuration of the ocean basins.
Western boundary de currents are more concentrated and eastern boundary currents are more diffusive Western boundary currents, such as the Gulf Stream and the Kuroshio Current, are typically narrow, fast-flowing currents that hug the western coastlines of ocean basins. These currents are often characterized by high speeds and carrying a large volume of water. Due to the Earth's rotation (Coriolis effect), the water in these currents is constrained to flow tightly along the coastline, leading to concentration in terms of speed and volume.
Eastern boundary currents, such as the California Current and the Canary Current, are broader, slower-moving currents that flow along the eastern coastlines of ocean basins. Unlike western boundary currents, eastern boundary currents are not as constrained by coastline geography and therefore tend to spread out over a wider area.
"Canary, Benguela, and Humboldt currents are eastern boundary currents" is also correct. These are all examples of eastern boundary currents: the Canary Current off the western coast of Africa, the Benguela Current off the western coast of southern Africa, and the Humboldt Current off the western coast of South America.