Physiology True statements about ions composition in body A Intracellular & Extracellular ions compositions are same B Phosphorus and Mg++ are major ions intracellularly C Na+, Cl- principal ions in E.C.F. D Kidney tightly regulates Na+, K+, Cl- composition 💡 Explanation True statements about ions composition in body ✓ Correct Answer: C. Na+, Cl- principal ions in E.C.F.