Which statement best describes isotonic, hypotonic, and hypertonic intravenous fluids, with one example each and where they act in body compartments?

Which statement best describes isotonic, hypotonic, and hypertonic intravenous fluids, with one example each and where they act in body compartments?

• A. Isotonic fluids like 0.9% NS stay in extracellular space; hypotonic fluids like 0.45% NS move into cells; hypertonic fluids like 3% NS draw water out of cells into extracellular space
• B. Isotonic fluids like Lactated Ringers move into cells; hypotonic fluids like 0.9% NS stay in vascular space; hypertonic fluids like 5% dextrose move into cells
• C. Isotonic fluids like 5% dextrose remain in cells; hypotonic fluids like 3% NS remain in extracellular space; hypertonic fluids like 0.9% NS pull water into cells
• D. Isotonic fluids like 0.45% NS move water out of cells; hypotonic fluids like 3% NS draw water from extracellular; hypertonic fluids like 0.9% NS stay in cells

Answer: (A)