Capital gain taxability

Hi Friends,

Can any one solve the below Question

Mr. A Sold his residential house in financial year 2009-10 and deposited the Cash as per Capital exemption scheem in the bank. and availed the exemption u/s 54. but subsequently he has failed to purchase or construct a residential house as on 31-03-2013.

Now in which the capital gain will be taxable ??? in the FY 2009-10 or In FY 2012-13