The normal levels of sodium in plasma is:

Correct option is A

Ans. (a)
Sol. Normal plasma sodium levels range from 135 to 143 mEq/L, essential for fluid balance, nerve function, and muscle function.
Explanation of each option:
· (a) 135–143 mEq/L – Correct. Normal sodium range in plasma.
· (b) 97–106 mEq/L – This range applies to chloride, not sodium.
· (c) 90–196 mg/100 ml – Incorrect unit and range for sodium.
· (d) 60–100 mg/dl – Refers more to glucose levels than sodium.