Hi sis007! http://img96.imageshack.us/img96/5725/red5e5etimes5e5e45e5e25.gif
Is this a trick question? Because, for the output voltage to be no lower than the voltage source, there can be no voltage drop between the two locations.
If you rule out the possibility of it being a trick question, then it seems there is more detail than you have provided here. Can you post a photo of the question that is associated with this diagram.