S. 143(3) Assessment – Disallowance of expenditure – Business income – Entries in the books of account is not conclusive- Alternative remedy – No deduction of expenses claimed either by assessee or unit holders – Addition made by AO wholly without jurisdiction – Writ petition maintainable – Assessment order quashed. [S. 10(23FBA), 28(i), 37(1), 115UB, 144B , 246A , Art. 226]