All mineral salts are absorbed in cells as

Minerals are absorbed by plants in

$A$ : Most minerals must enter the root by active absorption into the cytoplasm of epidermal cells.
$R$ : Minerals are present in the soil as charged particles.

Iron is absorbed from the soil in the form of .......

In which of the following forms is iron absorbed by plants?

Through which organ do plants absorb inorganic mineral elements from the soil?