S. 11 : Property held for charitable purposes-Rent receipt-Receipt from rent by assessee-society was in course of actual carrying out of objects of general public utility and same was below 20 per cent of total receipt-Commissioner (Appeals) is justified in allowing benefit under sections 11 and 12-Corpus donation-Donation received by assessee-society were with specific direction and also utilized for construction of fixed assets i.e. bhawans only, same was corpus donation exempted under section 11(1)(d) [S.2(15), 11(1)(d), 12A]