Which of the following is the correct SI abbreviation for milliliter?

• A. ML
• B. mL
• C. ml
• D. mm

Answer: (B)

Verified step by step guidance

1. Understand that SI unit abbreviations follow specific capitalization rules: the prefix symbol is lowercase unless it is derived from a proper noun, and the unit symbol is case-sensitive.
2. Recognize that the prefix for 'milli-' is represented by a lowercase 'm', which means one-thousandth (10^{-3}) of the base unit.
3. Know that the base unit for volume in the SI system is the liter, abbreviated as an uppercase 'L' to avoid confusion with the number '1'.
4. Combine the prefix and unit symbols correctly: the prefix 'm' (milli) followed by the unit 'L' (liter) gives 'mL'.
5. Conclude that the correct SI abbreviation for milliliter is 'mL', with a lowercase 'm' and uppercase 'L'.