What is the answer to the riddle which is sending the internet crazy?

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Hundreds of thousands have been left flummoxed by the puzzle which was posted on Facebook recently.

The riddle reads: "If Theresa's daughter is my daughter's mother, what am to Theresa?!

Is it a) Grandmother b) Mother c) Daughter d) Granddaughter e) I am Teresa"

Answer the question in our panel below and the SCROLL DOWN to find out if you are right.