**Question:** Content of Na' in ringer lactate is meq/1-

A. 5
B. 12
C. 15
D. 140

**Core Concept:** Ringer's Lactate Solution is a balanced electrolyte solution used for hydration and electrolyte replacement in clinical settings. It contains various ions and compounds, including sodium (Na+).

**Why the Correct Answer is Right:** Ringer's Lactate Solution has a balanced composition to mimic the normal plasma electrolyte concentrations. It contains 154 millimoles of sodium per liter (meq/L). Therefore, the correct answer is:

**Correct Answer: 15**

**Why Each Wrong Option is Incorrect:**

A. 5: This is too low, as it significantly deviates from the normal plasma sodium concentration.
B. 12: This is also too low and does not accurately represent the sodium concentration in Ringer's Lactate Solution.
C. 140: This is too high and does not reflect the correct sodium concentration in Ringer's Lactate Solution.

**Why Option D is Incorrect:** Although 140 millimoles of sodium per liter (meq/L) is close to the correct answer, it does not represent the balanced composition of Ringer's Lactate Solution.

**Clinical Pearl:** Ringer's Lactate Solution is commonly used as a resuscitation fluid in trauma patients, burn victims, and during surgical procedures to maintain fluid balance and electrolyte homeostasis. Close monitoring of electrolyte levels is essential to prevent complications like hyper- or hyponatremia.