Question

Choose the smallest value from the options.

• A. 1 m
• B. 1 cm
• C. 1 mm
• D. 1 km

Answer 1

The correct option is C 1 mm

Using prefix conversion of units,
$1km=1000m$
$1cm=\frac{1}{100}m$
$1mm=\frac{1}{1000}m$

Therefore, 1 mm is the smallest value among the given options.