Riddle

What period of time is the lightest/weighs the least?

Choose an answer

A.A second
B.A light year
C.A minute
D.A light year
Hint: It's a 3-word phrase with 10 letters, starting with "A".

Answer

A light year

Why this is the answer

Wordplay: A 'day' can be 'light' (daylight), unlike the night.

This riddle is filed under Science Riddles and rated Hard.

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