S. 80IB(10) : Housing projects-Bunglows which were duplexes surrendered by copaund wall-Portico and open terarace-Open terrace and portico was an area which was otherwise totally open and exposed and could not be brought within purview of inner measurement of residential unit-Two areas had to be excluded from computation of built-up area entitling assessee to benefit under section 80IB(10) of the Act. [S. 260A]