**Core Concept**
The patient is presenting with diabetic ketoacidosis (DKA), a metabolic state characterized by hyperglycemia, metabolic acidosis, and ketosis. This condition typically arises in the context of insulin deficiency, often seen in type 1 diabetes mellitus or insulin resistance in type 2 diabetes mellitus.

**Why the Correct Answer is Right**
The patient's presentation of metabolic acidosis (low blood pH and bicarbonate) and ketosis (elevated ketone bodies) in the setting of hyperglycemia (elevated blood glucose) is consistent with DKA. The expected level of blood glucose in DKA is typically elevated, often above 250 mg/dL, due to insulin deficiency and impaired glucose uptake by cells.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is likely incorrect as it represents a normal blood glucose level, which does not align with the patient's presentation of DKA.
**Option B:** This option may be incorrect as it represents a blood glucose level that is slightly elevated but not typically seen in DKA.
**Option C:** This option is likely incorrect as it represents a blood glucose level that is below the expected range for DKA.

**Clinical Pearl / High-Yield Fact**
In DKA, the serum glucose level is often used as a marker of the severity of the condition, with higher levels associated with more severe acidosis and worse outcomes.

**Correct Answer:** C. 350 mg/dl