1 deciliter equals which of the following?

• A. 0.1 liter
• B. 1 dl
• C. 10 ml
• D. 1 liter

Answer: (B)

Understanding deciliters and liters helps here. A deciliter is defined as one tenth of a liter, so 1 dl equals 0.1 liter, which is the same amount as 100 milliliters. Since the question asks what 1 deciliter equals, the most direct answer is the statement of the same unit: one deciliter. It matches the unit and quantity exactly without needing any conversion. If you expressed it in liters, you’d say 0.1 liter, which is the same amount, but the option that states one deciliter is the simplest direct match. The other options describe different volumes (for example, 0.1 liter is a valid conversion, but not the unit itself; 10 ml is too small; 1 liter is too large).