S. 12A : Registration-Trust or institution-Assessment proceedings-Pendency of application for registration-Registration is granted-Denial of exemption on ground registration granted was prospective and not applicable for Assessment year in question is not proper-Only the profit can be taxed and not the entire receipt if benefit of section 11 is to be denied-Adjustment under section 143(1) is bad in law. [S.11, 12A(2), 12AA, 143(1)]