S. 40A(2) : Expenses or payments not deductible-Excessive or unreasonable-Related parties-Fair market value of rent-Failure to conduct any enquiry-No disallowance can be made-Sister-in-law of an individual does not fall under definition of relative under section 2(41)-Rental payment on account of godowns / shop made to sisters-in-law could not be disallowed. [S. 2(41), 56(2)]