Mumbai, Sep 30 (ANI): Reserve Bank of India Governor Raghuram Rajan on Tuesday left key interest rates unchanged in his fourth bi-monthly credit policy review citing increased risks of inflation and difficult external situation on the geopolitical front. Rajan said that inflation target of 6% by January 2016 involves uncertainties and that RBI is more confident with the target of 8%. He also added that the value of rupee has also risen in the recent months.