Riddle

I count time, but have no end. Tick tick, but I am not a clock. What am I?

Choose an answer

A.Clock
B.Timer
C.Pendulum
D.Metronome
Hint: It's a word with 9 letters, starting with "M".

Answer

Metronome

Why this is the answer

A metronome ticks steadily to keep musical time, running as long as needed, but it isn't a clock and doesn't tell the actual time of day.

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