Claiming hra interest exemption

Hi,

I want to now that if the builder had provided me the letter of completion of construction and offer of possesion in the month of Feb 2014 and I have got the registry of the said property done in April 2014 in which Financial year Can i claim the exemption on LOAN Interest Payment Exemption ?

Should it be in FY 2013-2014 (AY 2014-2015) or FY 2014-2015(AY 2015-2016) ?

Modified my question to be of LOAN Availed from Bank