**Core Concept**
Normal anionic gap is a concept in clinical chemistry, referring to the difference between the major cations (sodium and potassium) and anions (chloride and bicarbonate) in the blood. A normal anionic gap is typically less than 12 mmol/L, indicating that the concentration of unmeasured anions (such as lactate, phosphate, and sulfates) does not exceed normal limits.

**Why the Correct Answer is Right**
A normal anionic gap is seen in conditions where there is a normal balance of measured and unmeasured anions. This can be due to a variety of factors such as a normal metabolic state, or in conditions where the unmeasured anions are not significantly elevated, such as in diabetic ketoacidosis (DKA) without significant lactic acidosis. In DKA, the anionic gap can be elevated due to the accumulation of ketones, which are unmeasured anions.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is a distractor, and the specific condition is not provided, making it difficult to determine why it would be incorrect. However, if it were a condition with an elevated anionic gap, such as lactic acidosis or renal failure, it would be incorrect.

**Option B:** This option is also a distractor, and without specific information, it's hard to say why it would be incorrect. However, if it were a condition with a normal anionic gap, such as DKA without significant lactic acidosis, it would be correct.

**Option C:** This option is a distractor, and without specific information, it's hard to say why it would be incorrect. However, if it were a condition with an elevated anionic gap, such as uremia or salicylate poisoning, it would be incorrect.

**Option D:** This option is a distractor, and without specific information, it's hard to say why it would be incorrect. However, if it were a condition with a normal anionic gap, such as metabolic alkalosis, it would be correct.

**Clinical Pearl / High-Yield Fact**
A normal anionic gap is often seen in conditions where there is a normal balance of measured and unmeasured anions. Remember that the anionic gap can be elevated in conditions with significant lactic acidosis or unmeasured anions, such as DKA with significant lactic acidosis, uremia, or salicylate poisoning.

**Correct Answer:** B. Metabolic alkalosis