A resident drinks 12 ounces of iced tea at lunch. How many milliliters is this?

• A. 180 ml
• B. 360 ml
• C. 240 ml
• D. 120 ml

Answer: (B)

This question tests converting fluid ounces to milliliters. In the US system, one fluid ounce is about 29.57 milliliters. Multiplying 12 ounces by 29.57 ml per ounce gives roughly 355 ml. Rounding to the nearest ten yields about 360 ml, which is the closest match. Using a simple estimate of 30 ml per ounce also gives 12 × 30 = 360 ml, a convenient and commonly used shortcut in clinical contexts. So the amount is about 360 ml. The other values would correspond to smaller totals (for example, around 180 ml is about 6 oz, 240 ml about 8 oz, and 120 ml about 4 oz).