An assessee had a piece of land "A" and a residential flat. He sold the plot 'A' and invested the entire sale consideration in buying another land 'B' for residential house. He now wants to sell the flat and with the sale proceeds he wants to construct a residential house on Land "B". Can he awail deduction u/s 54 F in case of sale of land 'A' and u/s 54 in case of sale of flat.?