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                   35 Points
                   Joined August 2013
                
               
			  
			  
             
            
             Both NRE and NRO account should be maintained in Indian rupees only.
But from NRE A/c  you can repatriate the money any where freely, but From NRO account you cannot transfer money NRE a/c or outside India easily
As the interest generated in India with the NRO account balance , so I don't think there is any reasonable ground to deny deduction u/s 80TTA
.