Diagonals $AC$ and $BD$ of a parallelogram $ABCD$ intersect each other at $O$. If $OA = 3\, cm$ and $OD = 2\, cm$,determine the lengths of $AC$ and $BD$.
- A$AC = 6\, cm, BD = 4\, cm$
- B$AC = 3\, cm, BD = 2\, cm$
- C$AC = 4\, cm, BD = 6\, cm$
- D$AC = 5\, cm, BD = 5\, cm$
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