Which of the following minerals is not remobilized in plants?

Assertion $A$: Phosphorus is essential in the structure of $ATP$.
Reason $R$: Magnesium is essential in the synthesis of $ATP$.
Which option is correct for Assertion $A$ and Reason $R$?

Which one of the following is correctly matched?

$A$ macronutrient is

$S$ - Statement: Chlorine is the major anion present in the blood.
$R$ - Reason: Molybdenum is required for nitrogen fixation in plants.

What is the primary role of micronutrients in living organisms?