S. 154 : Rectification of mistake-Mistake apparent from the record-Capital gains-Compensation for compulsory acquisition of commercial land from National Highways Authority of India (NHAI)-Clarificatory circular was issued by CBDT subsequent to the date of filing return-Eligible to file rectification application, claim of exemption of assessee under RFCTLARR Act was directed to be allowed by the AO. [S. 45, 56(2)(viii),139, Right to Fair Compensation and Transparency in Land Acquisition, Rehabilitation and Resettlement Act, 2013 S.96]