Seamount ferromanganese crusts are known to enrich several high-value metals such as cobalt, platinum, cerium and tellurium. Many national projects are assessing and exploring this valuable marine resource.

Consider the following about it.

1.    They occur in areas of significant volcanic activity.

2.    They float on water by virtue of their structural density.

3.    They are found where ocean currents prevent deposition of unconsolidated sediments.

4.    They are more enriched in Cobalt metal than the abyssal polymetallic nodules.

Select the correct answer using the codes given below