What is the mechanism by which minerals are absorbed by the roots?

Represent the union of two sets by Venn diagram for each of the following.

$X=\{x | x$ is a prime number between $80$ and $100\}$

$Y=\{y | y$ is an odd number between $90$ and $100\}$

It is observed that deficiency of a particular element showed its symptoms initially in older leaves and then in younger leaves.

Does it indicate that the element is actively mobilized or relatively immobile?

Read the following statements w.r.t. mineral ion absorption and state true (T) or false (F):
A. The rate of mineral absorption is usually dependent on their concentration in the soil.
B. Initial uptake of minerals into the apoplast is slow.
C. The passive movement of ions into the apoplast usually occurs through ion channels.
D. Uptake of minerals in symplast is an active process.