Detailed Solution:
The correct answer is “Milligram per decilitre”.
The blood glucose level is commonly expressed as Milligram per decilitre (mg/dL).
This unit measures the concentration of glucose in the blood. Other units such as grams per litre (g/L) or millimoles per litre (mmol/L) are also used in different contexts, but milligrams per decilitre is the most common unit in clinical practice for blood glucose levels.