Relating to deduction u/s 24(b)

the assessee is owner of 2houses(i.e.a&b). he took loan for the construction of house b only which is sop.. as per the provisions he can claim to the total of 150000 interest amount paid by him including pre-completion period interest. Query is: 1. can he claim this interest amount from his both house properties..?? 2. if interest amount exceeds 150000, is it possible to claim the excessive amount of interest from the other house..?!(i.e. deemed sop or lop).. Thank You in advance.