Final answer:
Pinocytosis is mainly carried out through uptake of extracellular fluid and solutes through small vesicles. Receptor-mediated endocytosis is a more selective process where receptors on the cell membrane bind to specific ligands, leading to the formation of coated vesicles.
Thus option C. is correct answer.
Step-by-step explanation:
Pinocytosis is mainly carried out through uptake of extracellular fluid and solutes through small vesicles. It is a non-specific process where the cell membrane folds to form a vesicle that carries substances dissolved in the extracellular fluid.
This allows the cell to absorb small particles and fluids. In contrast, receptor-mediated endocytosis is a more selective process where receptors on the cell membrane bind to specific ligands, leading to the formation of coated vesicles.
Thus option C. is correct answer.