Riddle

I am a king but also a common device of measure. What am I?

Choose an answer

A.Yardstick
B.Scepter
C.Crown
D.Ruler
Hint: It's a word with 5 letters, starting with "R".

Answer

Ruler

Why this is the answer

'Ruler' means both a king who rules a country and a flat measuring tool used to draw straight lines.

This riddle is filed under "What Am I?" Riddles and rated Medium.