Permeability of protoplasm is accelerated by

Answer: Option C

The permeability of protoplasm is accelerated by K (Potassium).
Potassium (K⁺) is of paramount importance in plant cell physiology. K⁺ is an essential macronutrient that fulfills critical functions related to enzyme activation, osmotic adjustment, turgor generation, cell expansion, regulation of membrane electric potential, and pH homeostasis.