On a per hectare basis which of the following forests will hold maximum amount of carbon?

Mangrove forests (like the Sunderbans) are highly efficient "blue carbon" sinks. On a per-hectare basis, coastal mangrove ecosystems store up to three to four times more carbon than typical terrestrial tropical rainforests or temperate deciduous forests.
While terrestrial forests store most of their carbon in above-ground biomass, mangroves sequestrate immense volumes of organic carbon in their deep, anaerobic waterlogged soil/sediment structures where decomposition is incredibly slow.