Riddle

Two in a corner, one in a room, zero in a house, but one in a shelter. What is it?

Choose an answer

A.Dust
B.Air
C.A shadow
D.The letter "r"
Hint: It's a 3-word phrase with 10 letters, starting with "T".

Answer

The letter "r"

Why this is the answer

Check the spelling of 'corner', 'room', and 'shelter'.

This riddle is filed under Hard/Difficult Riddles and rated Medium.