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    				| 1. | Which of the following ions perform important biological functions in maintenance of the ion balance and nerve impulse conduction?A. `Li^(+) Rb^(+)`B. `Na^(+) K^(+)`C. `Cs^(+) Fr^(+)`D. `Rb^(+) Cs^(+)` | 
| Answer» Correct Answer - B | |