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In [arXiv:0911.4808] K. Karami commented on my publication[arXiv:hep-th/0701242] and claimed that my result would be invalid. In fact hefound an error in calculation of the entropy of cold dark matter in section 3of my article, which is, however, a rather trivial one. It is shown that mydiscussion in section 3 of my paper works correctly if we take the value offree parameter $b^2>0.264$.

Reply to the comments of Karami on the Interacting holographic dark energy model and generalized second law of thermodynamics in a non-flat universe