Dear Sir,
In your case if effective possession is not transferred to you within 3 years of Loan borrowed than deduction of housing loan interest is not available to you.
With respect to your question it seems that you have taken loan in 2010 but house possession is transferred in the year 2015 only and hence you will not be eligible for housing loan interest deduction u/s 24(b). However you can still claim repayment of housing loan under section 80C. Also you can claim deduction with respect to earlier home loan u/s 24(b).