What is the normal creatinine level range in mg/dl?

The normal creatinine level range in mg/dl typically falls between approximately 0.6 to 1.2 mg/dl for adult males and 0.5 to 1.1 mg/dl for adult females. While the provided choices do not accurately reflect this range, it's important to understand that creatinine levels can vary slightly based on factors such as age, sex, muscle mass, and diet.

Understanding creatinine is crucial because it serves as a waste product formed from the normal breakdown of muscle tissue and is usually excreted by the kidneys. Elevated levels may indicate impaired kidney function, while low levels may suggest decreased muscle mass or other factors. In practice, healthcare professionals regularly monitor creatinine levels as part of assessing kidney health, making it imperative to know the normal reference ranges for accurate diagnosis and treatment planning.

The given answer of option B (10-18 mg/dl) significantly exceeds the normal range and is therefore not accurate, underscoring the importance of having precise knowledge about laboratory values in clinical practice.